eb6e5e05f9
0.81.1 of the i4b code - namely support of the I4B_VR_REQ ioctl via the i4brbchX device. Ppp controls the phone number, but idle timers and SYNC/RAW decisions are still made by isdnd (in isdnd.rc). This involves a new datalink state machine phase. The ``wait for carrier'' phase happens after dialing but before logging in. The whole dial state should really be abstracted so that each device type can deal with it in its own way (thinking about PPPoE) - but that'll have to wait. The ``set cd'' symantics remain the same for tty devices, but we now delay until we either get CD or timeout waiting (at which time we drop the link if we require CD). For i4b devices we always insist on carrier. Thanks to hm@ for his help, and especially for pointing out that I *don't* need to re-implement isdnd (that was a huge waste of time !) :-]
669 lines
19 KiB
C
669 lines
19 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 1.50 1999/06/02 15:58:53 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/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 <stdio.h>
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#include <stdlib.h>
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#include <string.h> /* memcpy() on some archs */
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#include <termios.h>
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#include "layer.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 "proto.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 "lqr.h"
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#include "hdlc.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 "link.h"
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#include "mp.h"
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#include "async.h"
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#include "physical.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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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 int CcpLayerUp(struct fsm *);
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static void CcpLayerDown(struct fsm *);
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static void CcpInitRestartCounter(struct fsm *, int);
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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 const char *ccp_TimerNames[] =
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{"CCP restart", "CCP openmode", "CCP stopped"};
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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;
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struct ccp *ccp;
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l = command_ChooseLink(arg);
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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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if (ccp->fsm.state == ST_OPENED) {
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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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}
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prompt_Printf(arg->prompt, "\n Defaults: ");
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prompt_Printf(arg->prompt, "FSM retry = %us, max %u Config"
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" REQ%s, %u Term REQ%s\n", ccp->cfg.fsm.timeout,
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ccp->cfg.fsm.maxreq, ccp->cfg.fsm.maxreq == 1 ? "" : "s",
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ccp->cfg.fsm.maxtrm, ccp->cfg.fsm.maxtrm == 1 ? "" : "s");
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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_SetupCallbacks(struct ccp *ccp)
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{
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ccp->fsm.fn = &ccp_Callbacks;
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ccp->fsm.FsmTimer.name = ccp_TimerNames[0];
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ccp->fsm.OpenTimer.name = ccp_TimerNames[1];
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ccp->fsm.StoppedTimer.name = ccp_TimerNames[2];
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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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fsm_Init(&ccp->fsm, "CCP", PROTO_CCP, 1, CCP_MAXCODE, LogCCP,
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bundle, l, parent, &ccp_Callbacks, ccp_TimerNames);
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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.fsm.timeout = DEF_FSMRETRY;
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ccp->cfg.fsm.maxreq = DEF_FSMTRIES;
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ccp->cfg.fsm.maxtrm = DEF_FSMTRIES;
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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->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, int what)
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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.fsm.timeout * SECTICKS;
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switch (what) {
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case FSM_REQ_TIMER:
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fp->restart = ccp->cfg.fsm.maxreq;
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break;
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case FSM_TRM_TIMER:
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fp->restart = ccp->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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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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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 (alloc || *o == NULL) {
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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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}
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if (cp + (*o)->val.len > buff + sizeof buff) {
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log_Printf(LogERROR, "%s: CCP REQ buffer overrun !\n", fp->link->name);
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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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fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, cp - buff, MB_CCPOUT);
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}
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void
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ccp_SendResetReq(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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fsm_Output(fp, CODE_RESETREQ, fp->reqid, NULL, 0, MB_CCPOUT);
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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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fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_CCPOUT);
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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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struct ccp *ccp = fsm2ccp(fp);
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log_Printf(LogCCP, "%s: LayerStart.\n", fp->link->name);
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fp->more.reqs = fp->more.naks = fp->more.rejs = ccp->cfg.fsm.maxreq * 3;
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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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struct ccp *ccp = fsm2ccp(fp);
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struct ccp_opt *next;
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log_Printf(LogCCP, "%s: LayerDown.\n", fp->link->name);
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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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ccp->in.algorithm = -1;
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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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ccp->out.algorithm = -1;
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}
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ccp->his_reject = ccp->my_reject = 0;
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while (ccp->out.opt) {
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next = ccp->out.opt->next;
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free(ccp->out.opt);
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ccp->out.opt = next;
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}
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ccp_Setup(ccp);
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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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log_Printf(LogCCP, "%s: LayerFinish.\n", fp->link->name);
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}
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/* Called when CCP has reached the OPEN state */
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static int
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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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log_Printf(LogCCP, "%s: LayerUp.\n", fp->link->name);
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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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log_Printf(LogERROR, "%s: %s (in) initialisation failure\n",
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fp->link->name, protoname(ccp->his_proto));
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ccp->his_proto = ccp->my_proto = -1;
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fsm_Close(fp);
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return 0;
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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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log_Printf(LogERROR, "%s: %s (out) initialisation failure\n",
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fp->link->name, protoname(ccp->my_proto));
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ccp->his_proto = ccp->my_proto = -1;
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fsm_Close(fp);
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return 0;
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}
|
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}
|
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|
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fp->more.reqs = fp->more.naks = fp->more.rejs = ccp->cfg.fsm.maxreq * 3;
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|
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log_Printf(LogCCP, "%s: Out = %s[%d], In = %s[%d]\n",
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fp->link->name, 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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return 1;
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}
|
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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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{
|
|
/* Deal with incoming data */
|
|
struct ccp *ccp = fsm2ccp(fp);
|
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int type, length, f;
|
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const char *end;
|
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|
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if (mode_type == MODE_REQ)
|
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ccp->in.algorithm = -1; /* In case we've received two REQs in a row */
|
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|
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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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|
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if (length == 0) {
|
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log_Printf(LogCCP, "%s: CCP size zero\n", fp->link->name);
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break;
|
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}
|
|
|
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if (length > sizeof(struct lcp_opt)) {
|
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length = sizeof(struct lcp_opt);
|
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log_Printf(LogCCP, "%s: Warning: Truncating length to %d\n",
|
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fp->link->name, length);
|
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}
|
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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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|
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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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|
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if (type < NCFTYPES)
|
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log_Printf(LogCCP, " %s[%d] %s\n", cftypes[type], length, end);
|
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else
|
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log_Printf(LogCCP, " ???[%d] %s\n", length, end);
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|
|
if (f == -1) {
|
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/* Don't understand that :-( */
|
|
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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}
|
|
} else {
|
|
struct ccp_opt *o;
|
|
|
|
switch (mode_type) {
|
|
case MODE_REQ:
|
|
if (IsAccepted(ccp->cfg.neg[algorithm[f]->Neg]) &&
|
|
ccp->in.algorithm == -1) {
|
|
memcpy(&ccp->in.opt, cp, length);
|
|
switch ((*algorithm[f]->i.Set)(&ccp->in.opt, &ccp->cfg)) {
|
|
case MODE_REJ:
|
|
memcpy(dec->rejend, &ccp->in.opt, ccp->in.opt.len);
|
|
dec->rejend += ccp->in.opt.len;
|
|
break;
|
|
case MODE_NAK:
|
|
memcpy(dec->nakend, &ccp->in.opt, ccp->in.opt.len);
|
|
dec->nakend += ccp->in.opt.len;
|
|
break;
|
|
case MODE_ACK:
|
|
memcpy(dec->ackend, cp, length);
|
|
dec->ackend += length;
|
|
ccp->his_proto = type;
|
|
ccp->in.algorithm = f; /* This one'll do :-) */
|
|
break;
|
|
}
|
|
} else {
|
|
memcpy(dec->rejend, cp, length);
|
|
dec->rejend += length;
|
|
}
|
|
break;
|
|
case MODE_NAK:
|
|
for (o = ccp->out.opt; o != NULL; o = o->next)
|
|
if (o->val.id == cp[0])
|
|
break;
|
|
if (o == NULL)
|
|
log_Printf(LogCCP, "%s: Warning: Ignoring peer NAK of unsent option\n",
|
|
fp->link->name);
|
|
else {
|
|
memcpy(&o->val, cp, length);
|
|
if ((*algorithm[f]->o.Set)(&o->val) == MODE_ACK)
|
|
ccp->my_proto = algorithm[f]->id;
|
|
else {
|
|
ccp->his_reject |= (1 << type);
|
|
ccp->my_proto = -1;
|
|
}
|
|
}
|
|
break;
|
|
case MODE_REJ:
|
|
ccp->his_reject |= (1 << type);
|
|
ccp->my_proto = -1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
plen -= cp[1];
|
|
cp += cp[1];
|
|
}
|
|
|
|
if (mode_type != MODE_NOP) {
|
|
if (dec->rejend != dec->rej) {
|
|
/* rejects are preferred */
|
|
dec->ackend = dec->ack;
|
|
dec->nakend = dec->nak;
|
|
if (ccp->in.state == NULL) {
|
|
ccp->his_proto = -1;
|
|
ccp->in.algorithm = -1;
|
|
}
|
|
} else if (dec->nakend != dec->nak) {
|
|
/* then NAKs */
|
|
dec->ackend = dec->ack;
|
|
if (ccp->in.state == NULL) {
|
|
ccp->his_proto = -1;
|
|
ccp->in.algorithm = -1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
extern struct mbuf *
|
|
ccp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp)
|
|
{
|
|
/* Got PROTO_CCP from link */
|
|
mbuf_SetType(bp, MB_CCPIN);
|
|
if (bundle_Phase(bundle) == PHASE_NETWORK)
|
|
fsm_Input(&l->ccp.fsm, bp);
|
|
else {
|
|
if (bundle_Phase(bundle) < PHASE_NETWORK)
|
|
log_Printf(LogCCP, "%s: Error: Unexpected CCP in phase %s (ignored)\n",
|
|
l->ccp.fsm.link->name, bundle_PhaseName(bundle));
|
|
mbuf_Free(bp);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
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) {
|
|
log_Printf(LogCCP, "%s: Incorrect ResetAck (id %d, not %d)"
|
|
" ignored\n", fp->link->name, id, ccp->reset_sent);
|
|
return;
|
|
}
|
|
/* Whaddaya know - a correct reset ack */
|
|
} else if (id == ccp->last_reset)
|
|
log_Printf(LogCCP, "%s: Duplicate ResetAck (resetting again)\n",
|
|
fp->link->name);
|
|
else {
|
|
log_Printf(LogCCP, "%s: Unexpected ResetAck (id %d) ignored\n",
|
|
fp->link->name, 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);
|
|
}
|
|
|
|
static struct mbuf *
|
|
ccp_LayerPush(struct bundle *b, struct link *l, struct mbuf *bp,
|
|
int pri, u_short *proto)
|
|
{
|
|
if (PROTO_COMPRESSIBLE(*proto) && l->ccp.fsm.state == ST_OPENED &&
|
|
l->ccp.out.state != NULL) {
|
|
bp = (*algorithm[l->ccp.out.algorithm]->o.Write)
|
|
(l->ccp.out.state, &l->ccp, l, pri, proto, bp);
|
|
switch (*proto) {
|
|
case PROTO_ICOMPD:
|
|
mbuf_SetType(bp, MB_ICOMPDOUT);
|
|
break;
|
|
case PROTO_COMPD:
|
|
mbuf_SetType(bp, MB_COMPDOUT);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return bp;
|
|
}
|
|
|
|
static struct mbuf *
|
|
ccp_LayerPull(struct bundle *b, struct link *l, struct mbuf *bp, u_short *proto)
|
|
{
|
|
/*
|
|
* If proto isn't PROTO_[I]COMPD, we still want to pass it to the
|
|
* decompression routines so that the dictionary's updated
|
|
*/
|
|
if (l->ccp.fsm.state == ST_OPENED) {
|
|
if (*proto == PROTO_COMPD || *proto == PROTO_ICOMPD) {
|
|
log_Printf(LogDEBUG, "ccp_LayerPull: PROTO_%sCOMPDP -> PROTO_IP\n",
|
|
*proto == PROTO_ICOMPD ? "I" : "");
|
|
/* Decompress incoming data */
|
|
if (l->ccp.reset_sent != -1)
|
|
/* Send another REQ and put the packet in the bit bucket */
|
|
fsm_Output(&l->ccp.fsm, CODE_RESETREQ, l->ccp.reset_sent, NULL, 0,
|
|
MB_CCPOUT);
|
|
else if (l->ccp.in.state != NULL) {
|
|
bp = (*algorithm[l->ccp.in.algorithm]->i.Read)
|
|
(l->ccp.in.state, &l->ccp, proto, bp);
|
|
switch (*proto) {
|
|
case PROTO_ICOMPD:
|
|
mbuf_SetType(bp, MB_ICOMPDIN);
|
|
break;
|
|
case PROTO_COMPD:
|
|
mbuf_SetType(bp, MB_COMPDIN);
|
|
break;
|
|
}
|
|
return bp;
|
|
}
|
|
mbuf_Free(bp);
|
|
bp = NULL;
|
|
} else if (PROTO_COMPRESSIBLE(*proto) && l->ccp.in.state != NULL) {
|
|
log_Printf(LogDEBUG, "ccp_LayerPull: Ignore packet (dict only)\n");
|
|
/* Add incoming Network Layer traffic to our dictionary */
|
|
(*algorithm[l->ccp.in.algorithm]->i.DictSetup)
|
|
(l->ccp.in.state, &l->ccp, *proto, bp);
|
|
} else
|
|
log_Printf(LogDEBUG, "ccp_LayerPull: Ignore packet\n");
|
|
}
|
|
|
|
return bp;
|
|
}
|
|
|
|
u_short
|
|
ccp_Proto(struct ccp *ccp)
|
|
{
|
|
return !link2physical(ccp->fsm.link) || !ccp->fsm.bundle->ncp.mp.active ?
|
|
PROTO_COMPD : PROTO_ICOMPD;
|
|
}
|
|
|
|
int
|
|
ccp_SetOpenMode(struct ccp *ccp)
|
|
{
|
|
int f;
|
|
|
|
for (f = 0; f < CCP_NEG_TOTAL; f++)
|
|
if (IsEnabled(ccp->cfg.neg[f])) {
|
|
ccp->fsm.open_mode = 0;
|
|
return 1;
|
|
}
|
|
|
|
ccp->fsm.open_mode = OPEN_PASSIVE; /* Go straight to ST_STOPPED ? */
|
|
|
|
for (f = 0; f < CCP_NEG_TOTAL; f++)
|
|
if (IsAccepted(ccp->cfg.neg[f]))
|
|
return 1;
|
|
|
|
return 0; /* No CCP at all */
|
|
}
|
|
|
|
struct layer ccplayer = { LAYER_CCP, "ccp", ccp_LayerPush, ccp_LayerPull };
|