freebsd-nq/usr.sbin/ppp/ipcp.c
Brian Somers 7308ec6890 Move the global FSMs into their relevent structures.
IPCP, CCP and LCP are now just derived FSMs.
Comment each of the FSM implementations so that we can
tell what's going on.
Revise the state transitions so that CCP and IPCP actually
send terminate REQs when appropriate.

The OS & IPCP layers are still like spagetti (next job).
1998-01-31 02:48:30 +00:00

741 lines
20 KiB
C

/*
* PPP IP Control Protocol (IPCP) 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: ipcp.c,v 1.50.2.3 1998/01/30 19:45:44 brian Exp $
*
* TODO:
* o More RFC1772 backwoard compatibility
*/
#include <sys/param.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "command.h"
#include "mbuf.h"
#include "log.h"
#include "defs.h"
#include "timer.h"
#include "fsm.h"
#include "lcpproto.h"
#include "lcp.h"
#include "iplist.h"
#include "throughput.h"
#include "ipcp.h"
#include "slcompress.h"
#include "os.h"
#include "phase.h"
#include "loadalias.h"
#include "vars.h"
#include "vjcomp.h"
#include "ip.h"
#include "route.h"
#include "filter.h"
#include "hdlc.h"
#include "link.h"
#include "physical.h"
struct compreq {
u_short proto;
u_char slots;
u_char compcid;
};
static void IpcpLayerUp(struct fsm *);
static void IpcpLayerDown(struct fsm *);
static void IpcpLayerStart(struct fsm *);
static void IpcpLayerFinish(struct fsm *);
static void IpcpInitRestartCounter(struct fsm *);
static void IpcpSendConfigReq(struct fsm *);
static void IpcpSendTerminateReq(struct fsm *);
static void IpcpSendTerminateAck(struct fsm *);
static void IpcpDecodeConfig(u_char *, int, int);
struct ipcpstate IpcpInfo = {
{
"IPCP",
PROTO_IPCP,
IPCP_MAXCODE,
0,
ST_INITIAL,
0, 0, 0,
{0, 0, 0, NULL, NULL, NULL}, /* FSM timer */
{0, 0, 0, NULL, NULL, NULL}, /* Open timer */
{0, 0, 0, NULL, NULL, NULL}, /* Stopped timer */
LogIPCP,
NULL,
IpcpLayerUp,
IpcpLayerDown,
IpcpLayerStart,
IpcpLayerFinish,
IpcpInitRestartCounter,
IpcpSendConfigReq,
IpcpSendTerminateReq,
IpcpSendTerminateAck,
IpcpDecodeConfig,
},
MAX_VJ_STATES,
1
};
static const char *cftypes[] = {
/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
"???",
"IPADDRS", /* 1: IP-Addresses */ /* deprecated */
"COMPPROTO", /* 2: IP-Compression-Protocol */
"IPADDR", /* 3: IP-Address */
};
#define NCFTYPES (sizeof cftypes/sizeof cftypes[0])
static const char *cftypes128[] = {
/* Check out the latest ``Assigned numbers'' rfc (rfc1700.txt) */
"???",
"PRIDNS", /* 129: Primary DNS Server Address */
"PRINBNS", /* 130: Primary NBNS Server Address */
"SECDNS", /* 131: Secondary DNS Server Address */
"SECNBNS", /* 132: Secondary NBNS Server Address */
};
#define NCFTYPES128 (sizeof cftypes128/sizeof cftypes128[0])
void
IpcpAddInOctets(int n)
{
throughput_addin(&IpcpInfo.throughput, n);
}
void
IpcpAddOutOctets(int n)
{
throughput_addout(&IpcpInfo.throughput, n);
}
int
ReportIpcpStatus(struct cmdargs const *arg)
{
if (!VarTerm)
return 1;
fprintf(VarTerm, "%s [%s]\n", IpcpInfo.fsm.name,
StateNames[IpcpInfo.fsm.state]);
if (IpcpInfo.fsm.state == ST_OPENED) {
fprintf(VarTerm, " his side: %s, %s\n",
inet_ntoa(IpcpInfo.his_ipaddr), vj2asc(IpcpInfo.his_compproto));
fprintf(VarTerm, " my side: %s, %s\n",
inet_ntoa(IpcpInfo.want_ipaddr), vj2asc(IpcpInfo.want_compproto));
}
fprintf(VarTerm, "Defaults:\n");
fprintf(VarTerm, " My Address: %s/%d\n",
inet_ntoa(IpcpInfo.DefMyAddress.ipaddr), IpcpInfo.DefMyAddress.width);
if (iplist_isvalid(&IpcpInfo.DefHisChoice))
fprintf(VarTerm, " His Address: %s\n", IpcpInfo.DefHisChoice.src);
else
fprintf(VarTerm, " His Address: %s/%d\n",
inet_ntoa(IpcpInfo.DefHisAddress.ipaddr),
IpcpInfo.DefHisAddress.width);
if (IpcpInfo.HaveTriggerAddress)
fprintf(VarTerm, " Negotiation(trigger): %s\n",
inet_ntoa(IpcpInfo.TriggerAddress));
else
fprintf(VarTerm, " Negotiation(trigger): MYADDR\n");
fprintf(VarTerm, "\n");
throughput_disp(&IpcpInfo.throughput, VarTerm);
return 0;
}
void
IpcpDefAddress()
{
/* Setup default IP addresses (`hostname` -> 0.0.0.0) */
struct hostent *hp;
char name[200];
memset(&IpcpInfo.DefMyAddress, '\0', sizeof IpcpInfo.DefMyAddress);
memset(&IpcpInfo.DefHisAddress, '\0', sizeof IpcpInfo.DefHisAddress);
IpcpInfo.HaveTriggerAddress = 0;
if (gethostname(name, sizeof name) == 0) {
hp = gethostbyname(name);
if (hp && hp->h_addrtype == AF_INET)
memcpy(&IpcpInfo.DefMyAddress.ipaddr.s_addr, hp->h_addr, hp->h_length);
}
}
int
SetInitVJ(struct cmdargs const *args)
{
if (args->argc != 2)
return -1;
if (!strcasecmp(args->argv[0], "slots")) {
int slots;
slots = atoi(args->argv[1]);
if (slots < 4 || slots > 16)
return 1;
IpcpInfo.VJInitSlots = slots;
return 0;
} else if (!strcasecmp(args->argv[0], "slotcomp")) {
if (!strcasecmp(args->argv[1], "on"))
IpcpInfo.VJInitComp = 1;
else if (!strcasecmp(args->argv[1], "off"))
IpcpInfo.VJInitComp = 0;
else
return 2;
return 0;
}
return -1;
}
int
ShowInitVJ(struct cmdargs const *args)
{
if (VarTerm) {
fprintf(VarTerm, "Initial slots: %d\n", IpcpInfo.VJInitSlots);
fprintf(VarTerm, "Initial compression: %s\n",
IpcpInfo.VJInitComp ? "on" : "off");
}
return 0;
}
void
IpcpInit(struct link *l)
{
/* Initialise ourselves */
FsmInit(&IpcpInfo.fsm, l);
if (iplist_isvalid(&IpcpInfo.DefHisChoice))
iplist_setrandpos(&IpcpInfo.DefHisChoice);
IpcpInfo.his_compproto = 0;
IpcpInfo.his_reject = IpcpInfo.my_reject = 0;
if ((mode & MODE_DEDICATED) && !GetLabel()) {
IpcpInfo.want_ipaddr.s_addr = IpcpInfo.his_ipaddr.s_addr = INADDR_ANY;
IpcpInfo.his_ipaddr.s_addr = INADDR_ANY;
} else {
IpcpInfo.want_ipaddr.s_addr = IpcpInfo.DefMyAddress.ipaddr.s_addr;
IpcpInfo.his_ipaddr.s_addr = IpcpInfo.DefHisAddress.ipaddr.s_addr;
}
/*
* Some implementations of PPP require that we send a
* *special* value as our address, even though the rfc specifies
* full negotiation (e.g. "0.0.0.0" or Not "0.0.0.0").
*/
if (IpcpInfo.HaveTriggerAddress) {
IpcpInfo.want_ipaddr.s_addr = IpcpInfo.TriggerAddress.s_addr;
LogPrintf(LogIPCP, "Using trigger address %s\n",
inet_ntoa(IpcpInfo.TriggerAddress));
}
if (Enabled(ConfVjcomp))
IpcpInfo.want_compproto = (PROTO_VJCOMP << 16) +
((IpcpInfo.VJInitSlots - 1) << 8) +
IpcpInfo.VJInitComp;
else
IpcpInfo.want_compproto = 0;
IpcpInfo.heis1172 = 0;
IpcpInfo.fsm.maxconfig = 10;
throughput_init(&IpcpInfo.throughput);
}
static void
IpcpInitRestartCounter(struct fsm * fp)
{
/* Set fsm timer load */
fp->FsmTimer.load = VarRetryTimeout * SECTICKS;
fp->restart = 5;
}
static void
IpcpSendConfigReq(struct fsm *fp)
{
/* Send config REQ please */
struct physical *p = link2physical(fp->link);
u_char *cp;
struct lcp_opt o;
cp = ReqBuff;
LogPrintf(LogIPCP, "IpcpSendConfigReq\n");
if ((p && !Physical_IsSync(p)) || !REJECTED(&IpcpInfo, TY_IPADDR)) {
o.id = TY_IPADDR;
o.len = 6;
*(u_long *)o.data = IpcpInfo.want_ipaddr.s_addr;
cp += LcpPutConf(LogIPCP, cp, &o, cftypes[o.id],
inet_ntoa(IpcpInfo.want_ipaddr));
}
if (IpcpInfo.want_compproto && !REJECTED(&IpcpInfo, TY_COMPPROTO)) {
const char *args;
o.id = TY_COMPPROTO;
if (IpcpInfo.heis1172) {
o.len = 4;
*(u_short *)o.data = htons(PROTO_VJCOMP);
args = "";
} else {
o.len = 6;
*(u_long *)o.data = htonl(IpcpInfo.want_compproto);
args = vj2asc(IpcpInfo.want_compproto);
}
cp += LcpPutConf(LogIPCP, cp, &o, cftypes[o.id], args);
}
FsmOutput(fp, CODE_CONFIGREQ, fp->reqid++, ReqBuff, cp - ReqBuff);
}
static void
IpcpSendTerminateReq(struct fsm * fp)
{
/* Term REQ just sent by FSM */
}
static void
IpcpSendTerminateAck(struct fsm * fp)
{
/* Send Term ACK please */
LogPrintf(LogIPCP, "IpcpSendTerminateAck\n");
FsmOutput(fp, CODE_TERMACK, fp->reqid++, NULL, 0);
}
static void
IpcpLayerStart(struct fsm * fp)
{
/* We're about to start up ! */
LogPrintf(LogIPCP, "IpcpLayerStart.\n");
}
static void
IpcpLayerFinish(struct fsm * fp)
{
/* We're now down */
LogPrintf(LogIPCP, "IpcpLayerFinish.\n");
/* Better tell LCP that it's all over (we're the only NCP) */
reconnect(RECON_FALSE);
LcpClose(&LcpInfo.fsm);
}
static void
IpcpLayerDown(struct fsm * fp)
{
/* About to come down */
LogPrintf(LogIPCP, "IpcpLayerDown.\n");
throughput_stop(&IpcpInfo.throughput);
throughput_log(&IpcpInfo.throughput, LogIPCP, NULL);
}
static void
IpcpLayerUp(struct fsm * fp)
{
/* We're now up */
char tbuff[100];
Prompt();
LogPrintf(LogIPCP, "IpcpLayerUp(%d).\n", fp->state);
snprintf(tbuff, sizeof tbuff, "myaddr = %s ",
inet_ntoa(IpcpInfo.want_ipaddr));
if (IpcpInfo.his_compproto >> 16 == PROTO_VJCOMP)
VjInit((IpcpInfo.his_compproto >> 8) & 255);
LogPrintf(LogIsKept(LogIPCP) ? LogIPCP : LogLINK, " %s hisaddr = %s\n",
tbuff, inet_ntoa(IpcpInfo.his_ipaddr));
if (OsSetIpaddress(IpcpInfo.want_ipaddr, IpcpInfo.his_ipaddr) < 0) {
if (VarTerm)
LogPrintf(LogERROR, "IpcpLayerUp: unable to set ip address\n");
return;
}
#ifndef NOALIAS
if (mode & MODE_ALIAS)
VarPacketAliasSetAddress(IpcpInfo.want_ipaddr);
#endif
OsLinkup();
throughput_start(&IpcpInfo.throughput);
StartIdleTimer();
}
void
IpcpUp()
{
/* Lower layers are ready.... go */
FsmUp(&IpcpInfo.fsm);
LogPrintf(LogIPCP, "IPCP Up event!!\n");
}
void
IpcpDown()
{
/* Physical link is gone - sudden death */
if (IpcpInfo.fsm.state >= ST_CLOSED) {
FsmDown(&IpcpInfo.fsm);
/* FsmDown() results in an IpcpLayerDown() if we're currently open. */
IpcpLayerFinish(&IpcpInfo.fsm);
}
}
void
IpcpOpen()
{
/* Start IPCP please */
FsmOpen(&IpcpInfo.fsm);
}
static int
AcceptableAddr(struct in_range *prange, struct in_addr ipaddr)
{
/* Is the given IP in the given range ? */
LogPrintf(LogDEBUG, "requested = %x\n", htonl(ipaddr.s_addr));
LogPrintf(LogDEBUG, "range = %x\n", htonl(prange->ipaddr.s_addr));
LogPrintf(LogDEBUG, "/%x\n", htonl(prange->mask.s_addr));
LogPrintf(LogDEBUG, "%x, %x\n", htonl(prange->ipaddr.s_addr & prange->
mask.s_addr), htonl(ipaddr.s_addr & prange->mask.s_addr));
return (prange->ipaddr.s_addr & prange->mask.s_addr) ==
(ipaddr.s_addr & prange->mask.s_addr) && ipaddr.s_addr;
}
static void
IpcpDecodeConfig(u_char * cp, int plen, int mode_type)
{
/* Deal with incoming PROTO_IPCP */
int type, length;
u_long *lp, compproto;
struct compreq *pcomp;
struct in_addr ipaddr, dstipaddr, dnsstuff, ms_info_req;
char tbuff[100];
char tbuff2[100];
ackp = AckBuff;
nakp = NakBuff;
rejp = RejBuff;
while (plen >= sizeof(struct fsmconfig)) {
type = *cp;
length = cp[1];
if (type < NCFTYPES)
snprintf(tbuff, sizeof tbuff, " %s[%d] ", cftypes[type], length);
else if (type > 128 && type < 128 + NCFTYPES128)
snprintf(tbuff, sizeof tbuff, " %s[%d] ", cftypes128[type-128], length);
else
snprintf(tbuff, sizeof tbuff, " <%d>[%d] ", type, length);
switch (type) {
case TY_IPADDR: /* RFC1332 */
lp = (u_long *) (cp + 2);
ipaddr.s_addr = *lp;
LogPrintf(LogIPCP, "%s %s\n", tbuff, inet_ntoa(ipaddr));
switch (mode_type) {
case MODE_REQ:
if (iplist_isvalid(&IpcpInfo.DefHisChoice)) {
if (ipaddr.s_addr == INADDR_ANY ||
iplist_ip2pos(&IpcpInfo.DefHisChoice, ipaddr) < 0 ||
OsTrySetIpaddress(IpcpInfo.DefMyAddress.ipaddr, ipaddr) != 0) {
LogPrintf(LogIPCP, "%s: Address invalid or already in use\n",
inet_ntoa(ipaddr));
IpcpInfo.his_ipaddr = ChooseHisAddr(IpcpInfo.DefMyAddress.ipaddr);
if (IpcpInfo.his_ipaddr.s_addr == INADDR_ANY) {
memcpy(rejp, cp, length);
rejp += length;
} else {
memcpy(nakp, cp, 2);
memcpy(nakp+2, &IpcpInfo.his_ipaddr.s_addr, length - 2);
nakp += length;
}
break;
}
} else if (!AcceptableAddr(&IpcpInfo.DefHisAddress, ipaddr)) {
/*
* If destination address is not acceptable, insist to use what we
* want to use.
*/
memcpy(nakp, cp, 2);
memcpy(nakp+2, &IpcpInfo.his_ipaddr.s_addr, length - 2);
nakp += length;
break;
}
IpcpInfo.his_ipaddr = ipaddr;
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK:
if (AcceptableAddr(&IpcpInfo.DefMyAddress, ipaddr)) {
/* Use address suggested by peer */
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff,
inet_ntoa(IpcpInfo.want_ipaddr));
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
IpcpInfo.want_ipaddr = ipaddr;
} else {
LogPrintf(LogIPCP, "%s: Unacceptable address!\n", inet_ntoa(ipaddr));
FsmClose(&IpcpInfo.fsm);
}
break;
case MODE_REJ:
IpcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_COMPPROTO:
lp = (u_long *) (cp + 2);
compproto = htonl(*lp);
LogPrintf(LogIPCP, "%s %s\n", tbuff, vj2asc(compproto));
switch (mode_type) {
case MODE_REQ:
if (!Acceptable(ConfVjcomp)) {
memcpy(rejp, cp, length);
rejp += length;
} else {
pcomp = (struct compreq *) (cp + 2);
switch (length) {
case 4: /* RFC1172 */
if (ntohs(pcomp->proto) == PROTO_VJCOMP) {
LogPrintf(LogWARN, "Peer is speaking RFC1172 compression protocol !\n");
IpcpInfo.heis1172 = 1;
IpcpInfo.his_compproto = compproto;
memcpy(ackp, cp, length);
ackp += length;
} else {
memcpy(nakp, cp, 2);
pcomp->proto = htons(PROTO_VJCOMP);
memcpy(nakp+2, &pcomp, 2);
nakp += length;
}
break;
case 6: /* RFC1332 */
if (ntohs(pcomp->proto) == PROTO_VJCOMP
&& pcomp->slots < MAX_VJ_STATES && pcomp->slots > 2) {
IpcpInfo.his_compproto = compproto;
IpcpInfo.heis1172 = 0;
memcpy(ackp, cp, length);
ackp += length;
} else {
memcpy(nakp, cp, 2);
pcomp->proto = htons(PROTO_VJCOMP);
pcomp->slots = MAX_VJ_STATES - 1;
pcomp->compcid = 0;
memcpy(nakp+2, &pcomp, sizeof pcomp);
nakp += length;
}
break;
default:
memcpy(rejp, cp, length);
rejp += length;
break;
}
}
break;
case MODE_NAK:
LogPrintf(LogIPCP, "%s changing compproto: %08x --> %08x\n",
tbuff, IpcpInfo.want_compproto, compproto);
IpcpInfo.want_compproto = compproto;
break;
case MODE_REJ:
IpcpInfo.his_reject |= (1 << type);
break;
}
break;
case TY_IPADDRS: /* RFC1172 */
lp = (u_long *) (cp + 2);
ipaddr.s_addr = *lp;
lp = (u_long *) (cp + 6);
dstipaddr.s_addr = *lp;
snprintf(tbuff2, sizeof tbuff2, "%s %s,", tbuff, inet_ntoa(ipaddr));
LogPrintf(LogIPCP, "%s %s\n", tbuff2, inet_ntoa(dstipaddr));
switch (mode_type) {
case MODE_REQ:
IpcpInfo.his_ipaddr = ipaddr;
IpcpInfo.want_ipaddr = dstipaddr;
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK:
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s", tbuff,
inet_ntoa(IpcpInfo.want_ipaddr));
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
IpcpInfo.want_ipaddr = ipaddr;
IpcpInfo.his_ipaddr = dstipaddr;
break;
case MODE_REJ:
IpcpInfo.his_reject |= (1 << type);
break;
}
break;
/*
* MS extensions for MS's PPP
*/
#ifndef NOMSEXT
case TY_PRIMARY_DNS: /* MS PPP DNS negotiation hack */
case TY_SECONDARY_DNS:
if (!Enabled(ConfMSExt)) {
LogPrintf(LogIPCP, "MS NS req - rejected - msext disabled\n");
IpcpInfo.my_reject |= (1 << type);
memcpy(rejp, cp, length);
rejp += length;
break;
}
switch (mode_type) {
case MODE_REQ:
lp = (u_long *) (cp + 2);
dnsstuff.s_addr = *lp;
ms_info_req.s_addr = IpcpInfo.ns_entries
[(type - TY_PRIMARY_DNS) ? 1 : 0].s_addr;
if (dnsstuff.s_addr != ms_info_req.s_addr) {
/*
* So the client has got the DNS stuff wrong (first request) so
* we'll tell 'em how it is
*/
memcpy(nakp, cp, 2); /* copy first two (type/length) */
LogPrintf(LogIPCP, "MS NS req %d:%s->%s - nak\n",
type,
inet_ntoa(dnsstuff),
inet_ntoa(ms_info_req));
memcpy(nakp+2, &ms_info_req, length);
nakp += length;
break;
}
/*
* Otherwise they have it right (this time) so we send a ack packet
* back confirming it... end of story
*/
LogPrintf(LogIPCP, "MS NS req %d:%s ok - ack\n",
type,
inet_ntoa(ms_info_req));
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK: /* what does this mean?? */
LogPrintf(LogIPCP, "MS NS req %d - NAK??\n", type);
break;
case MODE_REJ: /* confused?? me to :) */
LogPrintf(LogIPCP, "MS NS req %d - REJ??\n", type);
break;
}
break;
case TY_PRIMARY_NBNS: /* MS PPP NetBIOS nameserver hack */
case TY_SECONDARY_NBNS:
if (!Enabled(ConfMSExt)) {
LogPrintf(LogIPCP, "MS NBNS req - rejected - msext disabled\n");
IpcpInfo.my_reject |= (1 << type);
memcpy(rejp, cp, length);
rejp += length;
break;
}
switch (mode_type) {
case MODE_REQ:
lp = (u_long *) (cp + 2);
dnsstuff.s_addr = *lp;
ms_info_req.s_addr = IpcpInfo.nbns_entries
[(type - TY_PRIMARY_NBNS) ? 1 : 0].s_addr;
if (dnsstuff.s_addr != ms_info_req.s_addr) {
memcpy(nakp, cp, 2);
memcpy(nakp+2, &ms_info_req.s_addr, length);
LogPrintf(LogIPCP, "MS NBNS req %d:%s->%s - nak\n",
type,
inet_ntoa(dnsstuff),
inet_ntoa(ms_info_req));
nakp += length;
break;
}
LogPrintf(LogIPCP, "MS NBNS req %d:%s ok - ack\n",
type,
inet_ntoa(ms_info_req));
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK:
LogPrintf(LogIPCP, "MS NBNS req %d - NAK??\n", type);
break;
case MODE_REJ:
LogPrintf(LogIPCP, "MS NBNS req %d - REJ??\n", type);
break;
}
break;
#endif
default:
IpcpInfo.my_reject |= (1 << type);
memcpy(rejp, cp, length);
rejp += length;
break;
}
plen -= length;
cp += length;
}
}
void
IpcpInput(struct mbuf * bp)
{
/* Got PROTO_IPCP from link */
FsmInput(&IpcpInfo.fsm, bp);
}
int
UseHisaddr(const char *hisaddr, int setaddr)
{
/* Use `hisaddr' for the peers address (set iface if `setaddr') */
memset(&IpcpInfo.DefHisAddress, '\0', sizeof IpcpInfo.DefHisAddress);
iplist_reset(&IpcpInfo.DefHisChoice);
if (strpbrk(hisaddr, ",-")) {
iplist_setsrc(&IpcpInfo.DefHisChoice, hisaddr);
if (iplist_isvalid(&IpcpInfo.DefHisChoice)) {
iplist_setrandpos(&IpcpInfo.DefHisChoice);
IpcpInfo.his_ipaddr = ChooseHisAddr(IpcpInfo.want_ipaddr);
if (IpcpInfo.his_ipaddr.s_addr == INADDR_ANY) {
LogPrintf(LogWARN, "%s: None available !\n", IpcpInfo.DefHisChoice.src);
return(0);
}
IpcpInfo.DefHisAddress.ipaddr.s_addr = IpcpInfo.his_ipaddr.s_addr;
IpcpInfo.DefHisAddress.mask.s_addr = INADDR_BROADCAST;
IpcpInfo.DefHisAddress.width = 32;
} else {
LogPrintf(LogWARN, "%s: Invalid range !\n", hisaddr);
return 0;
}
} else if (ParseAddr(1, &hisaddr, &IpcpInfo.DefHisAddress.ipaddr,
&IpcpInfo.DefHisAddress.mask,
&IpcpInfo.DefHisAddress.width) != 0) {
IpcpInfo.his_ipaddr.s_addr = IpcpInfo.DefHisAddress.ipaddr.s_addr;
if (setaddr && OsSetIpaddress
(IpcpInfo.DefMyAddress.ipaddr, IpcpInfo.DefHisAddress.ipaddr) < 0) {
IpcpInfo.DefMyAddress.ipaddr.s_addr = INADDR_ANY;
IpcpInfo.DefHisAddress.ipaddr.s_addr = INADDR_ANY;
return 0;
}
} else
return 0;
return 1;
}