178189Sbrian/*- 278189Sbrian * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org> 378189Sbrian * based on work by Toshiharu OHNO <tony-o@iij.ad.jp> 478189Sbrian * Internet Initiative Japan, Inc (IIJ) 578189Sbrian * All rights reserved. 66059Samurai * 778189Sbrian * Redistribution and use in source and binary forms, with or without 878189Sbrian * modification, are permitted provided that the following conditions 978189Sbrian * are met: 1078189Sbrian * 1. Redistributions of source code must retain the above copyright 1178189Sbrian * notice, this list of conditions and the following disclaimer. 1278189Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1378189Sbrian * notice, this list of conditions and the following disclaimer in the 1478189Sbrian * documentation and/or other materials provided with the distribution. 156059Samurai * 1678189Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1778189Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1878189Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1978189Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2078189Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2178189Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2278189Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2378189Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2478189Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2578189Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2678189Sbrian * SUCH DAMAGE. 276059Samurai * 2850479Speter * $FreeBSD$ 296059Samurai */ 3078189Sbrian 3143313Sbrian#include <sys/param.h> 3230715Sbrian#include <netinet/in.h> 3336285Sbrian#include <netinet/in_systm.h> 3436285Sbrian#include <netinet/ip.h> 3581634Sbrian#include <sys/socket.h> 3636285Sbrian#include <sys/un.h> 3730715Sbrian 38102500Sbrian#include <stdarg.h> 3930715Sbrian#include <stdio.h> 4036285Sbrian#include <stdlib.h> 4149472Sbrian#include <string.h> /* memcpy() on some archs */ 4236285Sbrian#include <termios.h> 4330715Sbrian 4446686Sbrian#include "layer.h" 4537009Sbrian#include "defs.h" 4631343Sbrian#include "command.h" 4730715Sbrian#include "mbuf.h" 4830715Sbrian#include "log.h" 4930715Sbrian#include "timer.h" 506059Samurai#include "fsm.h" 5146686Sbrian#include "proto.h" 5213389Sphk#include "pred.h" 5331514Sbrian#include "deflate.h" 5436285Sbrian#include "throughput.h" 5536285Sbrian#include "iplist.h" 5636285Sbrian#include "slcompress.h" 5738557Sbrian#include "lqr.h" 5838557Sbrian#include "hdlc.h" 5963484Sbrian#include "lcp.h" 6063484Sbrian#include "ccp.h" 6181634Sbrian#include "ncpaddr.h" 6236285Sbrian#include "ipcp.h" 6336285Sbrian#include "filter.h" 6436285Sbrian#include "descriptor.h" 6536285Sbrian#include "prompt.h" 6636285Sbrian#include "link.h" 6736285Sbrian#include "mp.h" 6836285Sbrian#include "async.h" 6936285Sbrian#include "physical.h" 7043313Sbrian#ifndef NORADIUS 7143313Sbrian#include "radius.h" 7243313Sbrian#endif 7393418Sbrian#ifndef NODES 7467910Sbrian#include "mppe.h" 7567910Sbrian#endif 7681634Sbrian#include "ipv6cp.h" 7781634Sbrian#include "ncp.h" 7836285Sbrian#include "bundle.h" 798857Srgrimes 8026516Sbrianstatic void CcpSendConfigReq(struct fsm *); 8136285Sbrianstatic void CcpSentTerminateReq(struct fsm *); 8236285Sbrianstatic void CcpSendTerminateAck(struct fsm *, u_char); 8394894Sbrianstatic void CcpDecodeConfig(struct fsm *, u_char *, u_char *, int, 8436285Sbrian struct fsm_decode *); 8526516Sbrianstatic void CcpLayerStart(struct fsm *); 8626516Sbrianstatic void CcpLayerFinish(struct fsm *); 8736285Sbrianstatic int CcpLayerUp(struct fsm *); 8826516Sbrianstatic void CcpLayerDown(struct fsm *); 8944305Sbrianstatic void CcpInitRestartCounter(struct fsm *, int); 9078411Sbrianstatic int CcpRecvResetReq(struct fsm *); 9136285Sbrianstatic void CcpRecvResetAck(struct fsm *, u_char); 926059Samurai 9336285Sbrianstatic struct fsm_callbacks ccp_Callbacks = { 946059Samurai CcpLayerUp, 956059Samurai CcpLayerDown, 966059Samurai CcpLayerStart, 976059Samurai CcpLayerFinish, 986059Samurai CcpInitRestartCounter, 996059Samurai CcpSendConfigReq, 10036285Sbrian CcpSentTerminateReq, 1016059Samurai CcpSendTerminateAck, 1026059Samurai CcpDecodeConfig, 10336285Sbrian CcpRecvResetReq, 10436285Sbrian CcpRecvResetAck 1056059Samurai}; 1066059Samurai 10755146Sbrianstatic const char * const ccp_TimerNames[] = 10836285Sbrian {"CCP restart", "CCP openmode", "CCP stopped"}; 10936285Sbrian 11058034Sbrianstatic const char * 11158034Sbrianprotoname(int proto) 11258034Sbrian{ 11358034Sbrian static char const * const cftypes[] = { 11458034Sbrian /* Check out the latest ``Compression Control Protocol'' rfc (1962) */ 11558034Sbrian "OUI", /* 0: OUI */ 11658034Sbrian "PRED1", /* 1: Predictor type 1 */ 11758034Sbrian "PRED2", /* 2: Predictor type 2 */ 11858034Sbrian "PUDDLE", /* 3: Puddle Jumber */ 11958034Sbrian NULL, NULL, NULL, NULL, NULL, NULL, 12058034Sbrian NULL, NULL, NULL, NULL, NULL, NULL, 12158034Sbrian "HWPPC", /* 16: Hewlett-Packard PPC */ 12258034Sbrian "STAC", /* 17: Stac Electronics LZS (rfc1974) */ 12367910Sbrian "MPPE", /* 18: Microsoft PPC (rfc2118) and */ 12467910Sbrian /* Microsoft PPE (draft-ietf-pppext-mppe) */ 12558034Sbrian "GAND", /* 19: Gandalf FZA (rfc1993) */ 12658034Sbrian "V42BIS", /* 20: ARG->DATA.42bis compression */ 12758034Sbrian "BSD", /* 21: BSD LZW Compress */ 12858034Sbrian NULL, 12958034Sbrian "LZS-DCP", /* 23: LZS-DCP Compression Protocol (rfc1967) */ 13058034Sbrian "MAGNALINK/DEFLATE",/* 24: Magnalink Variable Resource (rfc1975) */ 13136285Sbrian /* 24: Deflate (according to pppd-2.3.*) */ 13258034Sbrian "DCE", /* 25: Data Circuit-Terminating Equip (rfc1976) */ 13358034Sbrian "DEFLATE", /* 26: Deflate (rfc1979) */ 13458034Sbrian }; 1356059Samurai 136134789Sbrian if (proto < 0 || (unsigned)proto > sizeof cftypes / sizeof *cftypes || 13785985Sbrian cftypes[proto] == NULL) { 13885985Sbrian if (proto == -1) 13985985Sbrian return "none"; 14058034Sbrian return HexStr(proto, NULL, 0); 14185985Sbrian } 14231171Sbrian 14331514Sbrian return cftypes[proto]; 14431514Sbrian} 14531514Sbrian 14631518Sbrian/* We support these algorithms, and Req them in the given order */ 14755146Sbrianstatic const struct ccp_algorithm * const algorithm[] = { 14831518Sbrian &DeflateAlgorithm, 14931514Sbrian &Pred1Algorithm, 15031518Sbrian &PppdDeflateAlgorithm 15193418Sbrian#ifndef NODES 15267910Sbrian , &MPPEAlgorithm 15367910Sbrian#endif 15431514Sbrian}; 15531514Sbrian 15631962Sbrian#define NALGORITHMS (sizeof algorithm/sizeof algorithm[0]) 15731514Sbrian 15825630Sbrianint 15936285Sbrianccp_ReportStatus(struct cmdargs const *arg) 1606059Samurai{ 16178411Sbrian struct ccp_opt **o; 16236285Sbrian struct link *l; 16336285Sbrian struct ccp *ccp; 16478411Sbrian int f; 16536285Sbrian 16637210Sbrian l = command_ChooseLink(arg); 16736285Sbrian ccp = &l->ccp; 16836285Sbrian 16936285Sbrian prompt_Printf(arg->prompt, "%s: %s [%s]\n", l->name, ccp->fsm.name, 17036285Sbrian State2Nam(ccp->fsm.state)); 17146686Sbrian if (ccp->fsm.state == ST_OPENED) { 17246686Sbrian prompt_Printf(arg->prompt, " My protocol = %s, His protocol = %s\n", 17346686Sbrian protoname(ccp->my_proto), protoname(ccp->his_proto)); 17446686Sbrian prompt_Printf(arg->prompt, " Output: %ld --> %ld, Input: %ld --> %ld\n", 17546686Sbrian ccp->uncompout, ccp->compout, 17646686Sbrian ccp->compin, ccp->uncompin); 17746686Sbrian } 17836285Sbrian 17978411Sbrian if (ccp->in.algorithm != -1) 18078411Sbrian prompt_Printf(arg->prompt, "\n Input Options: %s\n", 18178411Sbrian (*algorithm[ccp->in.algorithm]->Disp)(&ccp->in.opt)); 18278411Sbrian 18378411Sbrian if (ccp->out.algorithm != -1) { 18478411Sbrian o = &ccp->out.opt; 18578411Sbrian for (f = 0; f < ccp->out.algorithm; f++) 18678411Sbrian if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg])) 18778411Sbrian o = &(*o)->next; 18878411Sbrian prompt_Printf(arg->prompt, " Output Options: %s\n", 18978411Sbrian (*algorithm[ccp->out.algorithm]->Disp)(&(*o)->val)); 19078411Sbrian } 19178411Sbrian 19236285Sbrian prompt_Printf(arg->prompt, "\n Defaults: "); 19344305Sbrian prompt_Printf(arg->prompt, "FSM retry = %us, max %u Config" 19444305Sbrian " REQ%s, %u Term REQ%s\n", ccp->cfg.fsm.timeout, 19544305Sbrian ccp->cfg.fsm.maxreq, ccp->cfg.fsm.maxreq == 1 ? "" : "s", 19644305Sbrian ccp->cfg.fsm.maxtrm, ccp->cfg.fsm.maxtrm == 1 ? "" : "s"); 19736285Sbrian prompt_Printf(arg->prompt, " deflate windows: "); 19836285Sbrian prompt_Printf(arg->prompt, "incoming = %d, ", ccp->cfg.deflate.in.winsize); 19936285Sbrian prompt_Printf(arg->prompt, "outgoing = %d\n", ccp->cfg.deflate.out.winsize); 20093418Sbrian#ifndef NODES 20178411Sbrian prompt_Printf(arg->prompt, " MPPE: "); 20278411Sbrian if (ccp->cfg.mppe.keybits) 20378411Sbrian prompt_Printf(arg->prompt, "%d bits, ", ccp->cfg.mppe.keybits); 20478411Sbrian else 20578411Sbrian prompt_Printf(arg->prompt, "any bits, "); 20678411Sbrian switch (ccp->cfg.mppe.state) { 20778411Sbrian case MPPE_STATEFUL: 20879370Sbrian prompt_Printf(arg->prompt, "stateful"); 20978411Sbrian break; 21078411Sbrian case MPPE_STATELESS: 21178411Sbrian prompt_Printf(arg->prompt, "stateless"); 21278411Sbrian break; 21378411Sbrian case MPPE_ANYSTATE: 21478411Sbrian prompt_Printf(arg->prompt, "any state"); 21578411Sbrian break; 21678411Sbrian } 21778411Sbrian prompt_Printf(arg->prompt, "%s\n", 21878411Sbrian ccp->cfg.mppe.required ? ", required" : ""); 21978411Sbrian#endif 22078411Sbrian 22178411Sbrian prompt_Printf(arg->prompt, "\n DEFLATE: %s\n", 22236285Sbrian command_ShowNegval(ccp->cfg.neg[CCP_NEG_DEFLATE])); 22336285Sbrian prompt_Printf(arg->prompt, " PREDICTOR1: %s\n", 22436285Sbrian command_ShowNegval(ccp->cfg.neg[CCP_NEG_PRED1])); 22536285Sbrian prompt_Printf(arg->prompt, " DEFLATE24: %s\n", 22636285Sbrian command_ShowNegval(ccp->cfg.neg[CCP_NEG_DEFLATE24])); 22793418Sbrian#ifndef NODES 22878411Sbrian prompt_Printf(arg->prompt, " MPPE: %s\n", 22967910Sbrian command_ShowNegval(ccp->cfg.neg[CCP_NEG_MPPE])); 23067910Sbrian#endif 23125630Sbrian return 0; 2326059Samurai} 2336059Samurai 23436285Sbrianvoid 23536285Sbrianccp_SetupCallbacks(struct ccp *ccp) 2366059Samurai{ 23736285Sbrian ccp->fsm.fn = &ccp_Callbacks; 23836285Sbrian ccp->fsm.FsmTimer.name = ccp_TimerNames[0]; 23936285Sbrian ccp->fsm.OpenTimer.name = ccp_TimerNames[1]; 24036285Sbrian ccp->fsm.StoppedTimer.name = ccp_TimerNames[2]; 24131539Sbrian} 24231539Sbrian 24331539Sbrianvoid 24436285Sbrianccp_Init(struct ccp *ccp, struct bundle *bundle, struct link *l, 24536285Sbrian const struct fsm_parent *parent) 24631539Sbrian{ 24736285Sbrian /* Initialise ourselves */ 24836285Sbrian 24944305Sbrian fsm_Init(&ccp->fsm, "CCP", PROTO_CCP, 1, CCP_MAXCODE, LogCCP, 25036285Sbrian bundle, l, parent, &ccp_Callbacks, ccp_TimerNames); 25136285Sbrian 25236285Sbrian ccp->cfg.deflate.in.winsize = 0; 25336285Sbrian ccp->cfg.deflate.out.winsize = 15; 25444305Sbrian ccp->cfg.fsm.timeout = DEF_FSMRETRY; 25544305Sbrian ccp->cfg.fsm.maxreq = DEF_FSMTRIES; 25644305Sbrian ccp->cfg.fsm.maxtrm = DEF_FSMTRIES; 25736285Sbrian ccp->cfg.neg[CCP_NEG_DEFLATE] = NEG_ENABLED|NEG_ACCEPTED; 25836285Sbrian ccp->cfg.neg[CCP_NEG_PRED1] = NEG_ENABLED|NEG_ACCEPTED; 25936285Sbrian ccp->cfg.neg[CCP_NEG_DEFLATE24] = 0; 26093418Sbrian#ifndef NODES 26178411Sbrian ccp->cfg.mppe.keybits = 0; 26278411Sbrian ccp->cfg.mppe.state = MPPE_ANYSTATE; 26378411Sbrian ccp->cfg.mppe.required = 0; 26468906Sbrian ccp->cfg.neg[CCP_NEG_MPPE] = NEG_ENABLED|NEG_ACCEPTED; 26567910Sbrian#endif 26636285Sbrian 26736285Sbrian ccp_Setup(ccp); 2686059Samurai} 2696059Samurai 27036285Sbrianvoid 27136285Sbrianccp_Setup(struct ccp *ccp) 27236285Sbrian{ 27336285Sbrian /* Set ourselves up for a startup */ 27436285Sbrian ccp->fsm.open_mode = 0; 27536285Sbrian ccp->his_proto = ccp->my_proto = -1; 27636285Sbrian ccp->reset_sent = ccp->last_reset = -1; 27736285Sbrian ccp->in.algorithm = ccp->out.algorithm = -1; 27836285Sbrian ccp->in.state = ccp->out.state = NULL; 27994894Sbrian ccp->in.opt.hdr.id = -1; 28036285Sbrian ccp->out.opt = NULL; 28136285Sbrian ccp->his_reject = ccp->my_reject = 0; 28236285Sbrian ccp->uncompout = ccp->compout = 0; 28336285Sbrian ccp->uncompin = ccp->compin = 0; 28436285Sbrian} 28536285Sbrian 28678411Sbrian/* 28778411Sbrian * Is ccp *REQUIRED* ? 28878411Sbrian * We ask each of the configured ccp protocols if they're required and 28978411Sbrian * return TRUE if they are. 29078411Sbrian * 29178411Sbrian * It's not possible for the peer to reject a required ccp protocol 29278411Sbrian * without our state machine bringing the supporting lcp layer down. 29378411Sbrian * 29478411Sbrian * If ccp is required but not open, the NCP layer should not push 29578411Sbrian * any data into the link. 29678411Sbrian */ 29778411Sbrianint 29878411Sbrianccp_Required(struct ccp *ccp) 29978411Sbrian{ 300134789Sbrian unsigned f; 30178411Sbrian 30278411Sbrian for (f = 0; f < NALGORITHMS; f++) 30378411Sbrian if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg]) && 30478411Sbrian (*algorithm[f]->Required)(&ccp->fsm)) 30578411Sbrian return 1; 30678411Sbrian 30778411Sbrian return 0; 30878411Sbrian} 30978411Sbrian 31079165Sbrian/* 31179165Sbrian * Report whether it's possible to increase a packet's size after 31279165Sbrian * compression (and by how much). 31379165Sbrian */ 31479165Sbrianint 31579165Sbrianccp_MTUOverhead(struct ccp *ccp) 31679165Sbrian{ 31779396Sbrian if (ccp->fsm.state == ST_OPENED && ccp->out.algorithm >= 0) 31879165Sbrian return algorithm[ccp->out.algorithm]->o.MTUOverhead; 31979165Sbrian 32079165Sbrian return 0; 32179165Sbrian} 32279165Sbrian 3236059Samuraistatic void 32444305SbrianCcpInitRestartCounter(struct fsm *fp, int what) 3256059Samurai{ 32636285Sbrian /* Set fsm timer load */ 32736285Sbrian struct ccp *ccp = fsm2ccp(fp); 32836285Sbrian 32944305Sbrian fp->FsmTimer.load = ccp->cfg.fsm.timeout * SECTICKS; 33044305Sbrian switch (what) { 33144305Sbrian case FSM_REQ_TIMER: 33244305Sbrian fp->restart = ccp->cfg.fsm.maxreq; 33344305Sbrian break; 33444305Sbrian case FSM_TRM_TIMER: 33544305Sbrian fp->restart = ccp->cfg.fsm.maxtrm; 33644305Sbrian break; 33744305Sbrian default: 33844305Sbrian fp->restart = 1; 33944305Sbrian break; 34044305Sbrian } 3416059Samurai} 3426059Samurai 3436059Samuraistatic void 34430715SbrianCcpSendConfigReq(struct fsm *fp) 3456059Samurai{ 34636285Sbrian /* Send config REQ please */ 34736285Sbrian struct ccp *ccp = fsm2ccp(fp); 34836285Sbrian struct ccp_opt **o; 34936285Sbrian u_char *cp, buff[100]; 350134789Sbrian unsigned f; 351134789Sbrian int alloc; 3526059Samurai 35336285Sbrian cp = buff; 35436285Sbrian o = &ccp->out.opt; 35536285Sbrian alloc = ccp->his_reject == 0 && ccp->out.opt == NULL; 35636285Sbrian ccp->my_proto = -1; 35736285Sbrian ccp->out.algorithm = -1; 35831514Sbrian for (f = 0; f < NALGORITHMS; f++) 35936285Sbrian if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg]) && 36072025Sbrian !REJECTED(ccp, algorithm[f]->id) && 36172025Sbrian (*algorithm[f]->Usable)(fp)) { 36231514Sbrian 36336285Sbrian if (!alloc) 36436285Sbrian for (o = &ccp->out.opt; *o != NULL; o = &(*o)->next) 365134789Sbrian if ((*o)->val.hdr.id == algorithm[f]->id && (*o)->algorithm == (int)f) 36636285Sbrian break; 36736285Sbrian 36836285Sbrian if (alloc || *o == NULL) { 369136375Sbrian if ((*o = (struct ccp_opt *)malloc(sizeof(struct ccp_opt))) == NULL) { 370136375Sbrian log_Printf(LogERROR, "%s: Not enough memory for CCP REQ !\n", 371136375Sbrian fp->link->name); 372136375Sbrian break; 373136375Sbrian } 37494894Sbrian (*o)->val.hdr.id = algorithm[f]->id; 37594894Sbrian (*o)->val.hdr.len = 2; 37636285Sbrian (*o)->next = NULL; 37736285Sbrian (*o)->algorithm = f; 37898132Sbrian (*algorithm[f]->o.OptInit)(fp->bundle, &(*o)->val, &ccp->cfg); 37936285Sbrian } 38036285Sbrian 38194894Sbrian if (cp + (*o)->val.hdr.len > buff + sizeof buff) { 38236285Sbrian log_Printf(LogERROR, "%s: CCP REQ buffer overrun !\n", fp->link->name); 38336285Sbrian break; 38436285Sbrian } 38594894Sbrian memcpy(cp, &(*o)->val, (*o)->val.hdr.len); 38694894Sbrian cp += (*o)->val.hdr.len; 38736285Sbrian 38894894Sbrian ccp->my_proto = (*o)->val.hdr.id; 38936285Sbrian ccp->out.algorithm = f; 39036285Sbrian 39136285Sbrian if (alloc) 39236285Sbrian o = &(*o)->next; 39331514Sbrian } 39436285Sbrian 39547695Sbrian fsm_Output(fp, CODE_CONFIGREQ, fp->reqid, buff, cp - buff, MB_CCPOUT); 3966059Samurai} 3976059Samurai 3986059Samuraivoid 39936285Sbrianccp_SendResetReq(struct fsm *fp) 4006059Samurai{ 40136285Sbrian /* We can't read our input - ask peer to reset */ 40236285Sbrian struct ccp *ccp = fsm2ccp(fp); 40336285Sbrian 40436285Sbrian ccp->reset_sent = fp->reqid; 40536285Sbrian ccp->last_reset = -1; 40647695Sbrian fsm_Output(fp, CODE_RESETREQ, fp->reqid, NULL, 0, MB_CCPOUT); 4076059Samurai} 4086059Samurai 4096059Samuraistatic void 410134789SbrianCcpSentTerminateReq(struct fsm *fp __unused) 4116059Samurai{ 41236285Sbrian /* Term REQ just sent by FSM */ 4136059Samurai} 4146059Samurai 4156059Samuraistatic void 41636285SbrianCcpSendTerminateAck(struct fsm *fp, u_char id) 4176059Samurai{ 41836285Sbrian /* Send Term ACK please */ 41947695Sbrian fsm_Output(fp, CODE_TERMACK, id, NULL, 0, MB_CCPOUT); 4206059Samurai} 4216059Samurai 42278411Sbrianstatic int 42330715SbrianCcpRecvResetReq(struct fsm *fp) 4246059Samurai{ 42536285Sbrian /* Got a reset REQ, reset outgoing dictionary */ 42636285Sbrian struct ccp *ccp = fsm2ccp(fp); 42778411Sbrian if (ccp->out.state == NULL) 42878411Sbrian return 1; 42978411Sbrian return (*algorithm[ccp->out.algorithm]->o.Reset)(ccp->out.state); 4306059Samurai} 4316059Samurai 4326059Samuraistatic void 43330715SbrianCcpLayerStart(struct fsm *fp) 4346059Samurai{ 43536285Sbrian /* We're about to start up ! */ 43644305Sbrian struct ccp *ccp = fsm2ccp(fp); 43744305Sbrian 43837210Sbrian log_Printf(LogCCP, "%s: LayerStart.\n", fp->link->name); 43944305Sbrian fp->more.reqs = fp->more.naks = fp->more.rejs = ccp->cfg.fsm.maxreq * 3; 4406059Samurai} 4416059Samurai 4426059Samuraistatic void 44337160SbrianCcpLayerDown(struct fsm *fp) 4446059Samurai{ 44537160Sbrian /* About to come down */ 44636285Sbrian struct ccp *ccp = fsm2ccp(fp); 44736285Sbrian struct ccp_opt *next; 44836285Sbrian 44937210Sbrian log_Printf(LogCCP, "%s: LayerDown.\n", fp->link->name); 45036285Sbrian if (ccp->in.state != NULL) { 45136285Sbrian (*algorithm[ccp->in.algorithm]->i.Term)(ccp->in.state); 45236285Sbrian ccp->in.state = NULL; 45336285Sbrian ccp->in.algorithm = -1; 45436285Sbrian } 45536285Sbrian if (ccp->out.state != NULL) { 45636285Sbrian (*algorithm[ccp->out.algorithm]->o.Term)(ccp->out.state); 45736285Sbrian ccp->out.state = NULL; 45836285Sbrian ccp->out.algorithm = -1; 45936285Sbrian } 46036285Sbrian ccp->his_reject = ccp->my_reject = 0; 46198243Sbrian 46236285Sbrian while (ccp->out.opt) { 46336285Sbrian next = ccp->out.opt->next; 46436285Sbrian free(ccp->out.opt); 46536285Sbrian ccp->out.opt = next; 46636285Sbrian } 46737160Sbrian ccp_Setup(ccp); 4686059Samurai} 4696059Samurai 4706059Samuraistatic void 47137160SbrianCcpLayerFinish(struct fsm *fp) 4726059Samurai{ 47337160Sbrian /* We're now down */ 47468423Sbrian struct ccp *ccp = fsm2ccp(fp); 47568423Sbrian struct ccp_opt *next; 47668423Sbrian 47737210Sbrian log_Printf(LogCCP, "%s: LayerFinish.\n", fp->link->name); 47868423Sbrian 47968423Sbrian /* 48068423Sbrian * Nuke options that may be left over from sending a REQ but never 48168423Sbrian * coming up. 48268423Sbrian */ 48368423Sbrian while (ccp->out.opt) { 48468423Sbrian next = ccp->out.opt->next; 48568423Sbrian free(ccp->out.opt); 48668423Sbrian ccp->out.opt = next; 48768423Sbrian } 48878411Sbrian 48978411Sbrian if (ccp_Required(ccp)) { 49078411Sbrian if (fp->link->lcp.fsm.state == ST_OPENED) 49178411Sbrian log_Printf(LogLCP, "%s: Closing due to CCP completion\n", fp->link->name); 49278411Sbrian fsm_Close(&fp->link->lcp.fsm); 49378411Sbrian } 4946059Samurai} 4956059Samurai 49646828Sbrian/* Called when CCP has reached the OPEN state */ 49736285Sbrianstatic int 49830715SbrianCcpLayerUp(struct fsm *fp) 4996059Samurai{ 50036285Sbrian /* We're now up */ 50136285Sbrian struct ccp *ccp = fsm2ccp(fp); 50268423Sbrian struct ccp_opt **o; 503134789Sbrian unsigned f, fail; 50444305Sbrian 50579165Sbrian for (f = fail = 0; f < NALGORITHMS; f++) 50679165Sbrian if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg]) && 50779165Sbrian (*algorithm[f]->Required)(&ccp->fsm) && 508134789Sbrian (ccp->in.algorithm != (int)f || ccp->out.algorithm != (int)f)) { 50979165Sbrian /* Blow it all away - we haven't negotiated a required algorithm */ 51079165Sbrian log_Printf(LogWARN, "%s: Failed to negotiate (required) %s\n", 51179165Sbrian fp->link->name, protoname(algorithm[f]->id)); 51279165Sbrian fail = 1; 51379165Sbrian } 51479165Sbrian 51579165Sbrian if (fail) { 51679165Sbrian ccp->his_proto = ccp->my_proto = -1; 51779165Sbrian fsm_Close(fp); 51879165Sbrian fsm_Close(&fp->link->lcp.fsm); 51979165Sbrian return 0; 52079165Sbrian } 52179165Sbrian 52237210Sbrian log_Printf(LogCCP, "%s: LayerUp.\n", fp->link->name); 52344305Sbrian 52436285Sbrian if (ccp->in.state == NULL && ccp->in.algorithm >= 0 && 525134789Sbrian ccp->in.algorithm < (int)NALGORITHMS) { 52698132Sbrian ccp->in.state = (*algorithm[ccp->in.algorithm]->i.Init) 52798132Sbrian (fp->bundle, &ccp->in.opt); 52836285Sbrian if (ccp->in.state == NULL) { 52936285Sbrian log_Printf(LogERROR, "%s: %s (in) initialisation failure\n", 53036285Sbrian fp->link->name, protoname(ccp->his_proto)); 53136285Sbrian ccp->his_proto = ccp->my_proto = -1; 53236285Sbrian fsm_Close(fp); 53344305Sbrian return 0; 53436285Sbrian } 53532246Sbrian } 5366059Samurai 53768423Sbrian o = &ccp->out.opt; 538134789Sbrian if (ccp->out.algorithm > 0) 539134789Sbrian for (f = 0; f < (unsigned)ccp->out.algorithm; f++) 540134789Sbrian if (IsEnabled(ccp->cfg.neg[algorithm[f]->Neg])) 541134789Sbrian o = &(*o)->next; 54268423Sbrian 54336285Sbrian if (ccp->out.state == NULL && ccp->out.algorithm >= 0 && 544134789Sbrian ccp->out.algorithm < (int)NALGORITHMS) { 54598132Sbrian ccp->out.state = (*algorithm[ccp->out.algorithm]->o.Init) 54698132Sbrian (fp->bundle, &(*o)->val); 54736285Sbrian if (ccp->out.state == NULL) { 54836285Sbrian log_Printf(LogERROR, "%s: %s (out) initialisation failure\n", 54936285Sbrian fp->link->name, protoname(ccp->my_proto)); 55036285Sbrian ccp->his_proto = ccp->my_proto = -1; 55136285Sbrian fsm_Close(fp); 55244305Sbrian return 0; 55331514Sbrian } 55436285Sbrian } 55531514Sbrian 55644305Sbrian fp->more.reqs = fp->more.naks = fp->more.rejs = ccp->cfg.fsm.maxreq * 3; 55744305Sbrian 55836285Sbrian log_Printf(LogCCP, "%s: Out = %s[%d], In = %s[%d]\n", 55936285Sbrian fp->link->name, protoname(ccp->my_proto), ccp->my_proto, 56036285Sbrian protoname(ccp->his_proto), ccp->his_proto); 56144305Sbrian 56236285Sbrian return 1; 5636059Samurai} 5646059Samurai 5656059Samuraistatic void 56694894SbrianCcpDecodeConfig(struct fsm *fp, u_char *cp, u_char *end, int mode_type, 56736285Sbrian struct fsm_decode *dec) 5686059Samurai{ 56936285Sbrian /* Deal with incoming data */ 57036285Sbrian struct ccp *ccp = fsm2ccp(fp); 57194894Sbrian int f; 57294894Sbrian const char *disp; 57394894Sbrian struct fsm_opt *opt; 5746059Samurai 57546310Sbrian if (mode_type == MODE_REQ) 57646310Sbrian ccp->in.algorithm = -1; /* In case we've received two REQs in a row */ 57746310Sbrian 578134789Sbrian while (end >= cp + sizeof(opt->hdr)) { 57994894Sbrian if ((opt = fsm_readopt(&cp)) == NULL) 58036285Sbrian break; 58136285Sbrian 58231514Sbrian for (f = NALGORITHMS-1; f > -1; f--) 58394894Sbrian if (algorithm[f]->id == opt->hdr.id) 58431514Sbrian break; 5856059Samurai 58694894Sbrian disp = f == -1 ? "" : (*algorithm[f]->Disp)(opt); 58794894Sbrian if (disp == NULL) 58894894Sbrian disp = ""; 58936285Sbrian 59094894Sbrian log_Printf(LogCCP, " %s[%d] %s\n", protoname(opt->hdr.id), 59194894Sbrian opt->hdr.len, disp); 59236285Sbrian 59331514Sbrian if (f == -1) { 59431514Sbrian /* Don't understand that :-( */ 59531514Sbrian if (mode_type == MODE_REQ) { 59694894Sbrian ccp->my_reject |= (1 << opt->hdr.id); 59794894Sbrian fsm_rej(dec, opt); 59831514Sbrian } 59931514Sbrian } else { 60036285Sbrian struct ccp_opt *o; 60131514Sbrian 60231034Sbrian switch (mode_type) { 6036059Samurai case MODE_REQ: 60494894Sbrian if (IsAccepted(ccp->cfg.neg[algorithm[f]->Neg]) && 60572025Sbrian (*algorithm[f]->Usable)(fp) && 60636285Sbrian ccp->in.algorithm == -1) { 60794894Sbrian memcpy(&ccp->in.opt, opt, opt->hdr.len); 60898132Sbrian switch ((*algorithm[f]->i.Set)(fp->bundle, &ccp->in.opt, &ccp->cfg)) { 60931514Sbrian case MODE_REJ: 61094894Sbrian fsm_rej(dec, &ccp->in.opt); 61131514Sbrian break; 61231514Sbrian case MODE_NAK: 61394894Sbrian fsm_nak(dec, &ccp->in.opt); 61431514Sbrian break; 61531514Sbrian case MODE_ACK: 61694894Sbrian fsm_ack(dec, &ccp->in.opt); 61794894Sbrian ccp->his_proto = opt->hdr.id; 618134789Sbrian ccp->in.algorithm = (int)f; /* This one'll do :-) */ 61931514Sbrian break; 62031514Sbrian } 62194894Sbrian } else { 62294894Sbrian fsm_rej(dec, opt); 62394894Sbrian } 62494894Sbrian break; 6256059Samurai case MODE_NAK: 62636285Sbrian for (o = ccp->out.opt; o != NULL; o = o->next) 62794894Sbrian if (o->val.hdr.id == opt->hdr.id) 62836285Sbrian break; 62936285Sbrian if (o == NULL) 63067912Sbrian log_Printf(LogCCP, "%s: Warning: Ignoring peer NAK of unsent" 63167912Sbrian " option\n", fp->link->name); 63231514Sbrian else { 63394894Sbrian memcpy(&o->val, opt, opt->hdr.len); 63498132Sbrian if ((*algorithm[f]->o.Set)(fp->bundle, &o->val, &ccp->cfg) == 63598132Sbrian MODE_ACK) 63636285Sbrian ccp->my_proto = algorithm[f]->id; 63736285Sbrian else { 63894894Sbrian ccp->his_reject |= (1 << opt->hdr.id); 63994894Sbrian ccp->my_proto = -1; 64078411Sbrian if (algorithm[f]->Required(fp)) { 64178411Sbrian log_Printf(LogWARN, "%s: Cannot understand peers (required)" 64278411Sbrian " %s negotiation\n", fp->link->name, 64378411Sbrian protoname(algorithm[f]->id)); 64478411Sbrian fsm_Close(&fp->link->lcp.fsm); 64578411Sbrian } 64636285Sbrian } 64731514Sbrian } 64831514Sbrian break; 6496059Samurai case MODE_REJ: 65094894Sbrian ccp->his_reject |= (1 << opt->hdr.id); 65194894Sbrian ccp->my_proto = -1; 65278411Sbrian if (algorithm[f]->Required(fp)) { 65378411Sbrian log_Printf(LogWARN, "%s: Peer rejected (required) %s negotiation\n", 65478411Sbrian fp->link->name, protoname(algorithm[f]->id)); 65578411Sbrian fsm_Close(&fp->link->lcp.fsm); 65678411Sbrian } 65794894Sbrian break; 6586059Samurai } 6596059Samurai } 6606059Samurai } 66131514Sbrian 66236285Sbrian if (mode_type != MODE_NOP) { 66394894Sbrian fsm_opt_normalise(dec); 66494894Sbrian if (dec->rejend != dec->rej || dec->nakend != dec->nak) { 66536285Sbrian if (ccp->in.state == NULL) { 66636285Sbrian ccp->his_proto = -1; 66736285Sbrian ccp->in.algorithm = -1; 66836285Sbrian } 66936285Sbrian } 67031514Sbrian } 6716059Samurai} 6726059Samurai 67346686Sbrianextern struct mbuf * 67446686Sbrianccp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) 6756059Samurai{ 67636285Sbrian /* Got PROTO_CCP from link */ 67754912Sbrian m_settype(bp, MB_CCPIN); 67836285Sbrian if (bundle_Phase(bundle) == PHASE_NETWORK) 67946686Sbrian fsm_Input(&l->ccp.fsm, bp); 6806059Samurai else { 68136285Sbrian if (bundle_Phase(bundle) < PHASE_NETWORK) 68236285Sbrian log_Printf(LogCCP, "%s: Error: Unexpected CCP in phase %s (ignored)\n", 68346686Sbrian l->ccp.fsm.link->name, bundle_PhaseName(bundle)); 68454912Sbrian m_freem(bp); 6856059Samurai } 68646686Sbrian return NULL; 6876059Samurai} 68831514Sbrian 68936285Sbrianstatic void 69036285SbrianCcpRecvResetAck(struct fsm *fp, u_char id) 69131514Sbrian{ 69236285Sbrian /* Got a reset ACK, reset incoming dictionary */ 69336285Sbrian struct ccp *ccp = fsm2ccp(fp); 69436285Sbrian 69536285Sbrian if (ccp->reset_sent != -1) { 69636285Sbrian if (id != ccp->reset_sent) { 69744650Sbrian log_Printf(LogCCP, "%s: Incorrect ResetAck (id %d, not %d)" 69836285Sbrian " ignored\n", fp->link->name, id, ccp->reset_sent); 69932381Sbrian return; 70032381Sbrian } 70132381Sbrian /* Whaddaya know - a correct reset ack */ 70236285Sbrian } else if (id == ccp->last_reset) 70336285Sbrian log_Printf(LogCCP, "%s: Duplicate ResetAck (resetting again)\n", 70444650Sbrian fp->link->name); 70532381Sbrian else { 70644650Sbrian log_Printf(LogCCP, "%s: Unexpected ResetAck (id %d) ignored\n", 70744650Sbrian fp->link->name, id); 70832381Sbrian return; 70932381Sbrian } 71032381Sbrian 71136285Sbrian ccp->last_reset = ccp->reset_sent; 71236285Sbrian ccp->reset_sent = -1; 71336285Sbrian if (ccp->in.state != NULL) 71436285Sbrian (*algorithm[ccp->in.algorithm]->i.Reset)(ccp->in.state); 71531514Sbrian} 71631514Sbrian 71746686Sbrianstatic struct mbuf * 718134789Sbrianccp_LayerPush(struct bundle *b __unused, struct link *l, struct mbuf *bp, 71946686Sbrian int pri, u_short *proto) 72031514Sbrian{ 72178411Sbrian if (PROTO_COMPRESSIBLE(*proto)) { 72278411Sbrian if (l->ccp.fsm.state != ST_OPENED) { 72378411Sbrian if (ccp_Required(&l->ccp)) { 72478411Sbrian /* The NCP layer shouldn't have let this happen ! */ 72578411Sbrian log_Printf(LogERROR, "%s: Unexpected attempt to use an unopened and" 72678411Sbrian " required CCP layer\n", l->name); 72778411Sbrian m_freem(bp); 72878411Sbrian bp = NULL; 72978411Sbrian } 73078411Sbrian } else if (l->ccp.out.state != NULL) { 73178411Sbrian bp = (*algorithm[l->ccp.out.algorithm]->o.Write) 73278411Sbrian (l->ccp.out.state, &l->ccp, l, pri, proto, bp); 73378411Sbrian switch (*proto) { 73478411Sbrian case PROTO_ICOMPD: 73578411Sbrian m_settype(bp, MB_ICOMPDOUT); 73678411Sbrian break; 73778411Sbrian case PROTO_COMPD: 73878411Sbrian m_settype(bp, MB_COMPDOUT); 73978411Sbrian break; 74078411Sbrian } 74147695Sbrian } 74247695Sbrian } 74346686Sbrian 74446686Sbrian return bp; 74531514Sbrian} 74631514Sbrian 74746686Sbrianstatic struct mbuf * 748134789Sbrianccp_LayerPull(struct bundle *b __unused, struct link *l, struct mbuf *bp, 749134789Sbrian u_short *proto) 75031514Sbrian{ 75136285Sbrian /* 75236285Sbrian * If proto isn't PROTO_[I]COMPD, we still want to pass it to the 75336285Sbrian * decompression routines so that the dictionary's updated 75436285Sbrian */ 75546686Sbrian if (l->ccp.fsm.state == ST_OPENED) { 75636285Sbrian if (*proto == PROTO_COMPD || *proto == PROTO_ICOMPD) { 75736285Sbrian /* Decompress incoming data */ 75846686Sbrian if (l->ccp.reset_sent != -1) 75936285Sbrian /* Send another REQ and put the packet in the bit bucket */ 76047695Sbrian fsm_Output(&l->ccp.fsm, CODE_RESETREQ, l->ccp.reset_sent, NULL, 0, 76147695Sbrian MB_CCPOUT); 76247695Sbrian else if (l->ccp.in.state != NULL) { 76347695Sbrian bp = (*algorithm[l->ccp.in.algorithm]->i.Read) 76447695Sbrian (l->ccp.in.state, &l->ccp, proto, bp); 76547695Sbrian switch (*proto) { 76647695Sbrian case PROTO_ICOMPD: 76754912Sbrian m_settype(bp, MB_ICOMPDIN); 76847695Sbrian break; 76947695Sbrian case PROTO_COMPD: 77054912Sbrian m_settype(bp, MB_COMPDIN); 77147695Sbrian break; 77247695Sbrian } 77347695Sbrian return bp; 77447695Sbrian } 77554912Sbrian m_freem(bp); 77636285Sbrian bp = NULL; 77747061Sbrian } else if (PROTO_COMPRESSIBLE(*proto) && l->ccp.in.state != NULL) { 77836285Sbrian /* Add incoming Network Layer traffic to our dictionary */ 77946686Sbrian (*algorithm[l->ccp.in.algorithm]->i.DictSetup) 78046686Sbrian (l->ccp.in.state, &l->ccp, *proto, bp); 78199234Sbrian } 78236285Sbrian } 78336285Sbrian 78436285Sbrian return bp; 78531514Sbrian} 78631514Sbrian 78736285Sbrianu_short 78836285Sbrianccp_Proto(struct ccp *ccp) 78931514Sbrian{ 79036285Sbrian return !link2physical(ccp->fsm.link) || !ccp->fsm.bundle->ncp.mp.active ? 79136285Sbrian PROTO_COMPD : PROTO_ICOMPD; 79231514Sbrian} 79336310Sbrian 79437320Sbrianint 79536310Sbrianccp_SetOpenMode(struct ccp *ccp) 79636310Sbrian{ 79736310Sbrian int f; 79836310Sbrian 79936310Sbrian for (f = 0; f < CCP_NEG_TOTAL; f++) 80037320Sbrian if (IsEnabled(ccp->cfg.neg[f])) { 80136310Sbrian ccp->fsm.open_mode = 0; 80237320Sbrian return 1; 80337320Sbrian } 80436310Sbrian 80537320Sbrian ccp->fsm.open_mode = OPEN_PASSIVE; /* Go straight to ST_STOPPED ? */ 80637320Sbrian 80737320Sbrian for (f = 0; f < CCP_NEG_TOTAL; f++) 80837320Sbrian if (IsAccepted(ccp->cfg.neg[f])) 80937320Sbrian return 1; 81037320Sbrian 81137320Sbrian return 0; /* No CCP at all */ 81236310Sbrian} 81346686Sbrian 81472025Sbrianint 815134789Sbrianccp_DefaultUsable(struct fsm *fp __unused) 81672025Sbrian{ 81772025Sbrian return 1; 81872025Sbrian} 81972025Sbrian 82078411Sbrianint 821134789Sbrianccp_DefaultRequired(struct fsm *fp __unused) 82278411Sbrian{ 82378411Sbrian return 0; 82478411Sbrian} 82578411Sbrian 82646686Sbrianstruct layer ccplayer = { LAYER_CCP, "ccp", ccp_LayerPush, ccp_LayerPull }; 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