diff options
author | amurai <amurai@FreeBSD.org> | 1995-01-31 06:29:58 +0000 |
---|---|---|
committer | amurai <amurai@FreeBSD.org> | 1995-01-31 06:29:58 +0000 |
commit | 21ef2761fd1e5a4beb483da8bddf767d36540dce (patch) | |
tree | 3aecd1251d1647032ad1455f304eaeeaab4987d0 /usr.sbin/ppp/lcp.c | |
parent | 0487956fcf018d602bfe99b0e3398c6f4d55680a (diff) | |
download | FreeBSD-src-21ef2761fd1e5a4beb483da8bddf767d36540dce.zip FreeBSD-src-21ef2761fd1e5a4beb483da8bddf767d36540dce.tar.gz |
Diffstat (limited to 'usr.sbin/ppp/lcp.c')
-rw-r--r-- | usr.sbin/ppp/lcp.c | 656 |
1 files changed, 656 insertions, 0 deletions
diff --git a/usr.sbin/ppp/lcp.c b/usr.sbin/ppp/lcp.c new file mode 100644 index 0000000..175e7c6 --- /dev/null +++ b/usr.sbin/ppp/lcp.c @@ -0,0 +1,656 @@ +/* + * PPP Link Control Protocol (LCP) Module + * + * Written by Toshiharu OHNO (tony-o@iij.ad.jp) + * + * Copyright (C) 1993, Internet Initiative Japan, Inc. All rights reserverd. + * + * Redistribution and use in source and binary forms are permitted + * provided that the above copyright notice and this paragraph are + * duplicated in all such forms and that any documentation, + * advertising materials, and other materials related to such + * distribution and use acknowledge that the software was developed + * by the Internet Initiative Japan, Inc. The name of the + * IIJ may not be used to endorse or promote products derived + * from this software without specific prior written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED + * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * $Id:$ + * + * TODO: + * o Validate magic number received from peer. + * o Limit data field length by MRU + */ +#if __FreeBSD__ >=2 +#include <sys/time.h> +#endif +#include "fsm.h" +#include "lcp.h" +#include "ipcp.h" +#include "lcpproto.h" +#include "os.h" +#include "hdlc.h" +#include "lqr.h" +#include "phase.h" +#include "vars.h" + +extern void IpcpUp(); +extern void IpcpOpen(); +extern void SendPapChallenge(); +extern void SendChapChallenge(); +extern void SetLinkParams(struct lcpstate *); +extern void Prompt(); +extern void StopIdleTimer(); +extern void HdlcInit(); +extern void OsLinkdown(); +extern void Cleanup(); + +struct lcpstate LcpInfo; + +static void LcpSendConfigReq(struct fsm *); +static void LcpSendTerminateReq(struct fsm *fp); +static void LcpSendTerminateAck(struct fsm *fp); +static void LcpDecodeConfig(struct mbuf *bp, int mode); +static void LcpInitRestartCounter(struct fsm *); +static void LcpLayerUp(struct fsm *); +static void LcpLayerDown(struct fsm *); +static void LcpLayerStart(struct fsm *); +static void LcpLayerFinish(struct fsm *); + +extern int ModemSpeed(); + +#define REJECTED(p, x) (p->his_reject & (1<<x)) + +static char *cftypes[] = { + "???", "MRU", "ACCMAP", "AUTHPROTO", "QUALPROTO", "MAGICNUM", + "RESERVED", "PROTOCOMP", "ACFCOMP", "FCSALT", "SDP", +}; + +struct fsm LcpFsm = { + "LCP", /* Name of protocol */ + PROTO_LCP, /* Protocol Number */ + LCP_MAXCODE, + OPEN_ACTIVE, + ST_INITIAL, /* State of machine */ + 0, 0, 0, + + 0, + { 0, 0, 0, NULL, NULL, NULL }, + + LcpLayerUp, + LcpLayerDown, + LcpLayerStart, + LcpLayerFinish, + LcpInitRestartCounter, + LcpSendConfigReq, + LcpSendTerminateReq, + LcpSendTerminateAck, + LcpDecodeConfig, +}; + +static struct pppTimer LcpReportTimer; + +char *PhaseNames[] = { + "Dead", "Establish", "Authenticate", "Network", "Terminate" +}; + +void +NewPhase(new) +int new; +{ + struct lcpstate *lcp = &LcpInfo; + + phase = new; + LogPrintf(LOG_PHASE, "Phase: %s\n", PhaseNames[phase]); + switch (phase) { + case PHASE_AUTHENTICATE: + lcp->auth_ineed = lcp->want_auth; + lcp->auth_iwait = lcp->his_auth; + LogPrintf(LOG_PHASE, " his = %x, mine = %x\n", lcp->his_auth, lcp->want_auth); + if (lcp->his_auth || lcp->want_auth) { + if (lcp->his_auth == PROTO_PAP) + SendPapChallenge(); + if (lcp->want_auth == PROTO_CHAP) + SendChapChallenge(); + } else + NewPhase(PHASE_NETWORK); + break; + case PHASE_NETWORK: + IpcpUp(); + IpcpOpen(); + CcpUp(); + CcpOpen(); + break; + case PHASE_DEAD: + if (mode & MODE_DIRECT) + Cleanup(EX_DEAD); + break; + } +} + +static void +LcpReportTime() +{ +#ifdef VERBOSE + time_t t; + + time(&t); + logprintf("%s", ctime(&t)); +#endif + StopTimer(&LcpReportTimer); + LcpReportTimer.state = TIMER_STOPPED; + StartTimer(&LcpReportTimer); + HdlcErrorCheck(); +} + +int +ReportLcpStatus() +{ + struct lcpstate *lcp = &LcpInfo; + struct fsm *fp = &LcpFsm; + + printf("%s [%s]\n", fp->name, StateNames[fp->state]); + printf( + " his side: MRU %d, ACCMAP %08x, PROTOCOMP %d, ACFCOMP %d MAGIC %08x\n", + lcp->his_mru, lcp->his_accmap, lcp->his_protocomp, lcp->his_acfcomp, lcp->his_magic); + printf( + " my side: MRU %d, ACCMAP %08x, PROTOCOMP %d, ACFCOMP %d MAGIC %08x\n", + lcp->want_mru, lcp->want_accmap, lcp->want_protocomp, lcp->want_acfcomp, lcp->want_magic); + printf("\nDefaults: MRU = %d, ACCMAP = %08x\t", VarMRU, VarAccmap); + printf("Open Mode: %s\n", (VarOpenMode == OPEN_ACTIVE)? "active" : "passive"); + return(1); +} + +/* + * Generate random number which will be used as magic number. + */ +u_long +GenerateMagic() +{ + time_t tl; + struct timeval tval; + + time(&tl); + gettimeofday(&tval, NULL); + tl += tval.tv_sec ^ tval.tv_usec + getppid(); + tl *= getpid(); + return(tl); +} + +void +LcpInit() +{ + struct lcpstate *lcp = &LcpInfo; + + FsmInit(&LcpFsm); + HdlcInit(); + + bzero(lcp, sizeof(struct lcpstate)); + lcp->want_mru = VarMRU; + lcp->his_mru = DEF_MRU; + lcp->his_accmap = 0xffffffff; + lcp->want_accmap = VarAccmap; + lcp->want_magic = GenerateMagic(); + lcp->want_auth = lcp->his_auth = 0; + if (Enabled(ConfChap)) + lcp->want_auth = PROTO_CHAP; + else if (Enabled(ConfPap)) + lcp->want_auth = PROTO_PAP; + if (Enabled(ConfLqr)) lcp->want_lqrperiod = VarLqrTimeout * 100; + if (Enabled(ConfAcfcomp)) lcp->want_acfcomp = 1; + if (Enabled(ConfProtocomp)) lcp->want_protocomp = 1; + LcpFsm.maxconfig = 10; +} + +static void +LcpInitRestartCounter(fp) +struct fsm *fp; +{ + fp->FsmTimer.load = 5 * SECTICKS; + fp->restart = 5; +} + +void +PutConfValue(cpp, types, type, len, val) +u_char **cpp; +char **types; +u_char type; +int len; +u_long val; +{ + u_char *cp; + + cp = *cpp; + *cp++ = type; *cp++ = len; + if (len == 6) { + if (type == TY_IPADDR) { + LogPrintf(LOG_LCP, " %s [%d] %s\n", + types[type], len, inet_ntoa(htonl(val))); + } else { + LogPrintf(LOG_LCP, " %s [%d] %08x\n", types[type], len, val); + } + *cp++ = (val >> 24) & 0377; + *cp++ = (val >> 16) & 0377; + } else + LogPrintf(LOG_LCP, " %s [%d] %d\n", types[type], len, val); + *cp++ = (val >> 8) & 0377; + *cp++ = val & 0377; + *cpp = cp; +} + +static void +LcpSendConfigReq(fp) +struct fsm *fp; +{ + u_char *cp; + struct lcpstate *lcp = &LcpInfo; + struct lqrreq *req; + + LogPrintf(LOG_LCP, "%s: SendConfigReq\n", fp->name); + cp = ReqBuff; + if (lcp->want_acfcomp && !REJECTED(lcp, TY_ACFCOMP)) { + *cp++ = TY_ACFCOMP; *cp++ = 2; + LogPrintf(LOG_LCP, " %s\n", cftypes[TY_ACFCOMP]); + } + if (lcp->want_protocomp && !REJECTED(lcp, TY_PROTOCOMP)) { + *cp++ = TY_PROTOCOMP; *cp++ = 2; + LogPrintf(LOG_LCP, " %s\n", cftypes[TY_PROTOCOMP]); + } + if (!REJECTED(lcp, TY_MRU)) + PutConfValue(&cp, cftypes, TY_MRU, 4, lcp->want_mru); + if (!REJECTED(lcp, TY_ACCMAP)) + PutConfValue(&cp, cftypes, TY_ACCMAP, 6, lcp->want_accmap); + if (lcp->want_magic && !REJECTED(lcp, TY_MAGICNUM)) + PutConfValue(&cp, cftypes, TY_MAGICNUM, 6, lcp->want_magic); + if (lcp->want_lqrperiod && !REJECTED(lcp, TY_QUALPROTO)) { + req = (struct lqrreq *)cp; + req->type = TY_QUALPROTO; req->length = sizeof(struct lqrreq); + req->proto = htons(PROTO_LQR); + req->period = htonl(lcp->want_lqrperiod); + cp += sizeof(struct lqrreq); + LogPrintf(LOG_LCP, " %s (%d)\n", cftypes[TY_QUALPROTO], lcp->want_lqrperiod); + } + switch (lcp->want_auth) { + case PROTO_PAP: + PutConfValue(&cp, cftypes, TY_AUTHPROTO, 4, lcp->want_auth); + break; + case PROTO_CHAP: + PutConfValue(&cp, cftypes, TY_AUTHPROTO, 5, lcp->want_auth); + *cp++ = 5; /* Use MD5 */ + break; + } + FsmOutput(fp, CODE_CONFIGREQ, fp->reqid++, ReqBuff, cp - ReqBuff); +} + +void +LcpSendProtoRej(option, count) +u_char *option; +int count; +{ + struct fsm *fp = &LcpFsm; + + LogPrintf(LOG_LCP, "%s: SendProtoRej\n", fp->name); + FsmOutput(fp, CODE_PROTOREJ, fp->reqid, option, count); +} + +static void +LcpSendTerminateReq(fp) +struct fsm *fp; +{ + /* Most thins are done in fsm layer. Nothing to to. */ +} + +static void +LcpSendTerminateAck(fp) +struct fsm *fp; +{ + LogPrintf(LOG_LCP, "%s: SendTerminateAck.\n", fp->name); + FsmOutput(fp, CODE_TERMACK, fp->reqid++, NULL, 0); +} + +static void +LcpLayerStart(fp) +struct fsm *fp; +{ + LogPrintf(LOG_LCP, "%s: LayerStart\n", fp->name); + NewPhase(PHASE_ESTABLISH); +} + +static void +LcpLayerFinish(fp) +struct fsm *fp; +{ +#ifdef VERBOSE + fprintf(stderr, "%s: LayerFinish\r\n", fp->name); +#endif + Prompt(1); + LogPrintf(LOG_LCP, "%s: LayerFinish\n", fp->name); +#ifdef notdef + OsCloseLink(0); +#else + OsCloseLink(1); +#endif + NewPhase(PHASE_DEAD); + StopTimer(&LcpReportTimer); + StopIdleTimer(); + OsInterfaceDown(0); +} + +static void +LcpLayerUp(fp) +struct fsm *fp; +{ + LogPrintf(LOG_LCP, "%s: LayerUp\n", fp->name); + OsSetInterfaceParams(23, LcpInfo.his_mru, ModemSpeed()); + SetLinkParams(&LcpInfo); + + NewPhase(PHASE_AUTHENTICATE); + + StartLqm(); + StopTimer(&LcpReportTimer); + LcpReportTimer.state = TIMER_STOPPED; + LcpReportTimer.load = 60 * SECTICKS; + LcpReportTimer.func = LcpReportTime; + StartTimer(&LcpReportTimer); +} + +static void +LcpLayerDown(fp) +struct fsm *fp; +{ + LogPrintf(LOG_LCP, "%s: LayerDown\n", fp->name); + OsLinkdown(); + NewPhase(PHASE_TERMINATE); +} + +void +LcpUp() +{ + FsmUp(&LcpFsm); +} + +void +LcpDown() +{ + NewPhase(PHASE_DEAD); + FsmDown(&LcpFsm); +} + +void +LcpOpen(mode) +int mode; +{ + LcpFsm.open_mode = mode; + FsmOpen(&LcpFsm); +} + +void +LcpClose() +{ + FsmClose(&LcpFsm); +} + +/* + * XXX: Should validate option length + */ +static void +LcpDecodeConfig(bp, mode) +struct mbuf *bp; +int mode; +{ + u_char *cp; + char *request; + int plen, type, length, mru; + u_long *lp, magic, accmap; + u_short *sp, proto; + struct lqrreq *req; + + plen = plength(bp); + + cp = MBUF_CTOP(bp); + ackp = AckBuff; + nakp = NakBuff; + rejp = RejBuff; + + while (plen >= sizeof(struct fsmconfig)) { + type = *cp; + length = cp[1]; + if (type <= TY_ACFCOMP) + request = cftypes[type]; + else + request = "???"; + + switch (type) { + case TY_MRU: + sp = (u_short *)(cp + 2); + mru = htons(*sp); + LogPrintf(LOG_LCP, " %s %d\n", request, mru); + + switch (mode) { + case MODE_REQ: + if (mru > MAX_MRU) { + *sp = htons(MAX_MRU); + bcopy(cp, nakp, 4); nakp += 4; + } else if (mru < MIN_MRU) { + *sp = htons(MIN_MRU); + bcopy(cp, nakp, 4); nakp += 4; + } else { + LcpInfo.his_mru = mru; + bcopy(cp, ackp, 4); ackp += 4; + } + break; + case MODE_NAK: + if (mru >= MIN_MRU || mru <= MAX_MRU) + LcpInfo.want_mru = mru; + break; + case MODE_REJ: + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_ACCMAP: + lp = (u_long *)(cp + 2); + accmap = htonl(*lp); + LogPrintf(LOG_LCP, " %s %08x\n", request, accmap); + + switch (mode) { + case MODE_REQ: + LcpInfo.his_accmap = accmap; + bcopy(cp, ackp, 6); ackp += 6; + break; + case MODE_NAK: + LcpInfo.want_accmap = accmap; + break; + case MODE_REJ: + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_AUTHPROTO: + sp = (u_short *)(cp + 2); + proto = ntohs(*sp); + LogPrintf(LOG_LCP, " %s proto = %x\n", request, proto); + + switch (mode) { + case MODE_REQ: + switch (proto) { + case PROTO_PAP: + if (length != 4) { + LogPrintf(LOG_LCP, " %s bad length (%d)\n", request, length); + goto reqreject; + } + if (Acceptable(ConfPap)) { + LcpInfo.his_auth = proto; + bcopy(cp, ackp, length); ackp += length; + } else if (Acceptable(ConfChap)) { + *nakp++ = *cp; *nakp++ = 5; + *nakp++ = (unsigned char)PROTO_CHAP >> 8; + *nakp++ = (unsigned char)PROTO_CHAP; + *nakp++ = 5; + } else + goto reqreject; + break; + case PROTO_CHAP: + if (length < 5) { + LogPrintf(LOG_LCP, " %s bad length (%d)\n", request, length); + goto reqreject; + } + if (Acceptable(ConfChap) && cp[4] == 5) { + LcpInfo.his_auth = proto; + bcopy(cp, ackp, length); ackp += length; + } else if (Acceptable(ConfPap)) { + *nakp++ = *cp; *nakp++ = 4; + *nakp++ = (unsigned char)PROTO_PAP >> 8; + *nakp++ = (unsigned char)PROTO_PAP; + } else + goto reqreject; + break; + default: + LogPrintf(LOG_LCP, " %s not implemented.\n", request); + goto reqreject; + } + break; + case MODE_NAK: + break; + case MODE_REJ: + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_QUALPROTO: + req = (struct lqrreq *)cp; + LogPrintf(LOG_LCP, " %s proto: %x, interval: %dms\n", + request, ntohs(req->proto), ntohl(req->period)*10); + switch (mode) { + case MODE_REQ: + if (ntohs(req->proto) != PROTO_LQR || !Acceptable(ConfLqr)) + goto reqreject; + else { + LcpInfo.his_lqrperiod = ntohl(req->period); + if (LcpInfo.his_lqrperiod < 500) + LcpInfo.his_lqrperiod = 500; + req->period = htonl(LcpInfo.his_lqrperiod); + bcopy(cp, ackp, length); ackp += length; + } + break; + case MODE_NAK: + break; + case MODE_REJ: + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_MAGICNUM: + lp = (u_long *)(cp + 2); + magic = ntohl(*lp); + LogPrintf(LOG_LCP, " %s %08x\n", request, magic); + + switch (mode) { + case MODE_REQ: + if (LcpInfo.want_magic) { + /* XXX: Shoud validate magic number */ + if (magic == LcpInfo.want_magic) + logprintf("magic is same!! %x, %x, %x\n", + magic, LcpInfo.want_magic, LcpInfo.his_magic); + LcpInfo.his_magic = magic; + bcopy(cp, ackp, length); ackp += length; + } else { + LcpInfo.my_reject |= (1 << type); + goto reqreject; + } + break; + case MODE_NAK: + LogPrintf(LOG_LCP, " %s magic %08x has NAKed\n", request, magic); + LcpInfo.want_magic = GenerateMagic(); + break; + case MODE_REJ: + LogPrintf(LOG_LCP, " %s magic has REJected\n", request); + LcpInfo.want_magic = 0; + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_PROTOCOMP: + LogPrintf(LOG_LCP, " %s\n", request); + + switch (mode) { + case MODE_REQ: + if (Acceptable(ConfProtocomp)) { + LcpInfo.his_protocomp = 1; + bcopy(cp, ackp, 2); ackp += 2; + } else { +#ifdef OLDMST + /* + * MorningStar before v1.3 needs NAK + */ + bcopy(cp, nakp, 2); nakp += 2; +#else + bcopy(cp, rejp, 2); rejp += 2; + LcpInfo.my_reject |= (1 << type); +#endif + } + break; + case MODE_NAK: + case MODE_REJ: + LcpInfo.want_protocomp = 0; + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_ACFCOMP: + LogPrintf(LOG_LCP, " %s\n", request); + switch (mode) { + case MODE_REQ: + if (Acceptable(ConfAcfcomp)) { + LcpInfo.his_acfcomp = 1; + bcopy(cp, ackp, 2); + ackp += 2; + } else { +#ifdef OLDMST + /* + * MorningStar before v1.3 needs NAK + */ + bcopy(cp, nakp, 2); + nakp += 2; +#else + bcopy(cp, rejp, 2); + rejp += 2; + LcpInfo.my_reject |= (1 << type); +#endif + } + break; + case MODE_NAK: + case MODE_REJ: + LcpInfo.want_acfcomp = 0; + LcpInfo.his_reject |= (1 << type); + break; + } + break; + case TY_SDP: + LogPrintf(LOG_LCP, " %s\n", request); + switch (mode) { + case MODE_REQ: + case MODE_NAK: + case MODE_REJ: + break; + } + break; + default: +reqreject: + bcopy(cp, rejp, length); + rejp += length; + LcpInfo.my_reject |= (1 << type); + break; + } + plen -= length; + cp += length; + } +} + +void +LcpInput(struct mbuf *bp) +{ + FsmInput(&LcpFsm, bp); +} |