d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
9876c443a8
freebsd-skq/usr.sbin/ppp/ipcp.c
Brian Somers 455aabc3f8 o Hook the FSMs into our bundle. 
o The FSM layering is now more sane.
o Move a lot of the NCP stuff into our ipcpstate rather than having it
  in the bundle, including control of the configured IP addresses.  We
  don't need hacks like the global `linkup' variable any more as the
  FSM decides when our ppp.link* files get run.  This is going to eventually
  be configurable based on FSM events anyway.
o Fix a few inconsistencies when both sides require authentication.
o We now have "Ppp..." and "PPp" prompts, reflecting authentication
  and network phase.  We don't print loads of spurious prompts as we
  change phases any more.
o Our phase is part of the bundle now.
o Fix a bug where the FSM wasn't calling LayerFinish.
o Close the FSM down correctly with a signal rather than slamming it
  down as if the line was dropped (the undocumented ``down'' command
  is still available though).
o Remove the forgotten `tunno' variable and fix references to it.
1998-02-07 20:50:08 +00:00

916 lines
25 KiB
C
Raw Blame History

/*
* 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 1.50.2.8 1998/02/06 02:24:19 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 <sys/time.h>
#include <net/if.h>
#include <sys/sockio.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/errno.h>
#include <termios.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 "bundle.h"
#include "loadalias.h"
#include "vars.h"
#include "vjcomp.h"
#include "ip.h"
#include "route.h"
#include "filter.h"
#include "hdlc.h"
#include "async.h"
#include "link.h"
#include "physical.h"
#include "id.h"
#include "arp.h"
#include "systems.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(struct fsm *, u_char *, int, int);
static struct fsm_callbacks ipcp_Callbacks = {
IpcpLayerUp,
IpcpLayerDown,
IpcpLayerStart,
IpcpLayerFinish,
IpcpInitRestartCounter,
IpcpSendConfigReq,
IpcpSendTerminateReq,
IpcpSendTerminateAck,
IpcpDecodeConfig,
};
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, /* link */
NULL, /* bundle */
&ipcp_Callbacks,
},
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, "\nDefaults:\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, " Initial VJ slots: %d\n", IpcpInfo.VJInitSlots);
fprintf(VarTerm, " Initial VJ compression: %s\n",
IpcpInfo.VJInitComp ? "on" : "off");
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;
}
void
IpcpInit(struct bundle *bundle, struct link *l)
{
/* Initialise ourselves */
FsmInit(&IpcpInfo.fsm, bundle, 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));
}
IpcpInfo.if_mine.s_addr = IpcpInfo.if_peer.s_addr = INADDR_ANY;
if (Enabled(ConfVjcomp))
IpcpInfo.want_compproto = (PROTO_VJCOMP << 16) +
((IpcpInfo.VJInitSlots - 1) << 8) +
IpcpInfo.VJInitComp;
else
IpcpInfo.want_compproto = 0;
VjInit(IpcpInfo.VJInitSlots - 1);
IpcpInfo.heis1172 = 0;
IpcpInfo.fsm.maxconfig = 10;
throughput_init(&IpcpInfo.throughput);
}
static int
ipcp_SetIPaddress(struct bundle *bundle, struct ipcpstate *ipcp,
struct in_addr myaddr, struct in_addr hisaddr,
struct in_addr netmask, int silent)
{
struct sockaddr_in *sock_in;
int s;
u_long mask, addr;
struct ifaliasreq ifra;
/* If given addresses are alreay set, then ignore this request */
if (ipcp->if_mine.s_addr == myaddr.s_addr &&
ipcp->if_peer.s_addr == hisaddr.s_addr)
return 0;
s = ID0socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0) {
LogPrintf(LogERROR, "SetIpDevice: socket(): %s\n", strerror(errno));
return (-1);
}
memset(&ifra, '\0', sizeof ifra);
strncpy(ifra.ifra_name, bundle->ifname, sizeof ifra.ifra_name - 1);
ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0';
/* If different address has been set, then delete it first */
if (ipcp->if_mine.s_addr != INADDR_ANY ||
ipcp->if_peer.s_addr != INADDR_ANY)
if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) {
LogPrintf(LogERROR, "SetIpDevice: ioctl(SIOCDIFADDR): %s\n",
strerror(errno));
close(s);
return (-1);
}
/* Set interface address */
sock_in = (struct sockaddr_in *)&ifra.ifra_addr;
sock_in->sin_family = AF_INET;
sock_in->sin_addr = myaddr;
sock_in->sin_len = sizeof *sock_in;
/* Set destination address */
sock_in = (struct sockaddr_in *)&ifra.ifra_broadaddr;
sock_in->sin_family = AF_INET;
sock_in->sin_addr = hisaddr;
sock_in->sin_len = sizeof *sock_in;
addr = ntohl(myaddr.s_addr);
if (IN_CLASSA(addr))
mask = IN_CLASSA_NET;
else if (IN_CLASSB(addr))
mask = IN_CLASSB_NET;
else
mask = IN_CLASSC_NET;
/* if subnet mask is given, use it instead of class mask */
if (netmask.s_addr != INADDR_ANY && (ntohl(netmask.s_addr) & mask) == mask)
mask = ntohl(netmask.s_addr);
sock_in = (struct sockaddr_in *)&ifra.ifra_mask;
sock_in->sin_family = AF_INET;
sock_in->sin_addr.s_addr = htonl(mask);
sock_in->sin_len = sizeof *sock_in;
if (ID0ioctl(s, SIOCAIFADDR, &ifra) < 0) {
if (!silent)
LogPrintf(LogERROR, "SetIpDevice: ioctl(SIOCAIFADDR): %s\n",
strerror(errno));
close(s);
return (-1);
}
ipcp->if_peer.s_addr = hisaddr.s_addr;
ipcp->if_mine.s_addr = myaddr.s_addr;
if (Enabled(ConfProxy))
sifproxyarp(bundle, ipcp, s);
close(s);
return (0);
}
static struct in_addr
ChooseHisAddr(struct bundle *bundle, struct ipcpstate *ipcp,
const struct in_addr gw)
{
struct in_addr try;
int f;
for (f = 0; f < IpcpInfo.DefHisChoice.nItems; f++) {
try = iplist_next(&IpcpInfo.DefHisChoice);
LogPrintf(LogDEBUG, "ChooseHisAddr: Check item %d (%s)\n",
f, inet_ntoa(try));
if (ipcp_SetIPaddress(bundle, ipcp, gw, try, ifnetmask, 1) == 0) {
LogPrintf(LogIPCP, "ChooseHisAddr: Selected IP address %s\n",
inet_ntoa(try));
break;
}
}
if (f == IpcpInfo.DefHisChoice.nItems) {
LogPrintf(LogDEBUG, "ChooseHisAddr: All addresses in use !\n");
try.s_addr = INADDR_ANY;
}
return try;
}
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);
struct ipcpstate *ipcp = fsm2ipcp(fp);
u_char *cp;
struct lcp_opt o;
cp = ReqBuff;
LogPrintf(LogIPCP, "IpcpSendConfigReq\n");
if ((p && !Physical_IsSync(p)) || !REJECTED(ipcp, TY_IPADDR)) {
o.id = TY_IPADDR;
o.len = 6;
*(u_long *)o.data = ipcp->want_ipaddr.s_addr;
cp += LcpPutConf(LogIPCP, cp, &o, cftypes[o.id],
inet_ntoa(ipcp->want_ipaddr));
}
if (ipcp->want_compproto && !REJECTED(ipcp, TY_COMPPROTO)) {
const char *args;
o.id = TY_COMPPROTO;
if (ipcp->heis1172) {
o.len = 4;
*(u_short *)o.data = htons(PROTO_VJCOMP);
args = "";
} else {
o.len = 6;
*(u_long *)o.data = htonl(ipcp->want_compproto);
args = vj2asc(ipcp->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");
/* This is where we should be setting up the interface in AUTO mode */
}
static void
IpcpLayerFinish(struct fsm *fp)
{
/* We're now down */
LogPrintf(LogIPCP, "IpcpLayerFinish.\n");
}
static void
IpcpLayerDown(struct fsm *fp)
{
/* About to come down */
struct ipcpstate *ipcp = fsm2ipcp(fp);
const char *s;
s = inet_ntoa(ipcp->if_peer);
LogPrintf(LogIsKept(LogLINK) ? LogLINK : LogIPCP, "IpcpLayerDown: %s\n", s);
throughput_stop(&ipcp->throughput);
throughput_log(&ipcp->throughput, LogIPCP, NULL);
/*
* XXX this stuff should really live in the FSM. Our config should
* associate executable sections in files with events.
*/
if (SelectSystem(fp->bundle, s, LINKDOWNFILE) < 0)
if (GetLabel()) {
if (SelectSystem(fp->bundle, GetLabel(), LINKDOWNFILE) < 0)
SelectSystem(fp->bundle, "MYADDR", LINKDOWNFILE);
} else
SelectSystem(fp->bundle, "MYADDR", LINKDOWNFILE);
if (!(mode & MODE_AUTO)) {
struct ifaliasreq ifra;
int s;
s = ID0socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0) {
LogPrintf(LogERROR, "IpcpLayerDown: socket: %s\n", strerror(errno));
return;
}
if (Enabled(ConfProxy))
cifproxyarp(fp->bundle, ipcp, s);
if (ipcp->if_mine.s_addr != INADDR_ANY ||
ipcp->if_peer.s_addr != INADDR_ANY) {
memset(&ifra, '\0', sizeof ifra);
strncpy(ifra.ifra_name, fp->bundle->ifname, sizeof ifra.ifra_name - 1);
ifra.ifra_name[sizeof ifra.ifra_name - 1] = '\0';
/* XXX don't delete things belonging to other NCPs */
if (ID0ioctl(s, SIOCDIFADDR, &ifra) < 0) {
LogPrintf(LogERROR, "IpcpLayerDown: ioctl(SIOCDIFADDR): %s\n",
strerror(errno));
close(s);
return;
}
ipcp->if_mine.s_addr = ipcp->if_peer.s_addr = INADDR_ANY;
}
close(s);
return;
}
}
static void
IpcpLayerUp(struct fsm *fp)
{
/* We're now up */
struct ipcpstate *ipcp = fsm2ipcp(fp);
char tbuff[100];
LogPrintf(LogIPCP, "IpcpLayerUp(%d).\n", fp->state);
snprintf(tbuff, sizeof tbuff, "myaddr = %s ", inet_ntoa(ipcp->want_ipaddr));
LogPrintf(LogIsKept(LogIPCP) ? LogIPCP : LogLINK, " %s hisaddr = %s\n",
tbuff, inet_ntoa(ipcp->his_ipaddr));
if (ipcp->his_compproto >> 16 == PROTO_VJCOMP)
VjInit((ipcp->his_compproto >> 8) & 255);
if (ipcp_SetIPaddress(fp->bundle, ipcp, ipcp->want_ipaddr,
ipcp->his_ipaddr, ifnetmask, 0) < 0) {
if (VarTerm)
LogPrintf(LogERROR, "IpcpLayerUp: unable to set ip address\n");
return;
}
#ifndef NOALIAS
if (mode & MODE_ALIAS)
VarPacketAliasSetAddress(ipcp->want_ipaddr);
#endif
LogPrintf(LogIsKept(LogLINK) ? LogLINK : LogIPCP, "IpcpLayerUp: %s\n",
inet_ntoa(ipcp->if_peer));
/*
* XXX this stuff should really live in the FSM. Our config should
* associate executable sections in files with events.
*/
if (SelectSystem(fp->bundle, inet_ntoa(ipcp->if_mine), LINKUPFILE) < 0)
if (GetLabel()) {
if (SelectSystem(fp->bundle, GetLabel(), LINKUPFILE) < 0)
SelectSystem(fp->bundle, "MYADDR", LINKUPFILE);
} else
SelectSystem(fp->bundle, "MYADDR", LINKUPFILE);
throughput_start(&ipcp->throughput);
StartIdleTimer();
Prompt(fp->bundle);
}
void
IpcpUp()
{
/* Lower layers are ready.... go */
FsmUp(&IpcpInfo.fsm);
LogPrintf(LogIPCP, "IPCP Up event!!\n");
}
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(struct fsm *fp, u_char * cp, int plen, int mode_type)
{
/* Deal with incoming PROTO_IPCP */
struct ipcpstate *ipcp = fsm2ipcp(fp);
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(&ipcp->DefHisChoice)) {
if (ipaddr.s_addr == INADDR_ANY ||
iplist_ip2pos(&ipcp->DefHisChoice, ipaddr) < 0 ||
ipcp_SetIPaddress(fp->bundle, ipcp, ipcp->DefMyAddress.ipaddr,
ipaddr, ifnetmask, 1)) {
LogPrintf(LogIPCP, "%s: Address invalid or already in use\n",
inet_ntoa(ipaddr));
ipcp->his_ipaddr = ChooseHisAddr
(fp->bundle, ipcp, ipcp->DefMyAddress.ipaddr);
if (ipcp->his_ipaddr.s_addr == INADDR_ANY) {
memcpy(rejp, cp, length);
rejp += length;
} else {
memcpy(nakp, cp, 2);
memcpy(nakp+2, &ipcp->his_ipaddr.s_addr, length - 2);
nakp += length;
}
break;
}
} else if (!AcceptableAddr(&ipcp->DefHisAddress, ipaddr)) {
/*
* If destination address is not acceptable, insist to use what we
* want to use.
*/
memcpy(nakp, cp, 2);
memcpy(nakp+2, &ipcp->his_ipaddr.s_addr, length - 2);
nakp += length;
break;
}
ipcp->his_ipaddr = ipaddr;
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK:
if (AcceptableAddr(&ipcp->DefMyAddress, ipaddr)) {
/* Use address suggested by peer */
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s ", tbuff,
inet_ntoa(ipcp->want_ipaddr));
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
ipcp->want_ipaddr = ipaddr;
} else {
LogPrintf(LogIPCP, "%s: Unacceptable address!\n", inet_ntoa(ipaddr));
FsmClose(&ipcp->fsm);
}
break;
case MODE_REJ:
ipcp->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");
ipcp->heis1172 = 1;
ipcp->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) {
ipcp->his_compproto = compproto;
ipcp->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, ipcp->want_compproto, compproto);
ipcp->want_compproto = compproto;
break;
case MODE_REJ:
ipcp->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:
ipcp->his_ipaddr = ipaddr;
ipcp->want_ipaddr = dstipaddr;
memcpy(ackp, cp, length);
ackp += length;
break;
case MODE_NAK:
snprintf(tbuff2, sizeof tbuff2, "%s changing address: %s", tbuff,
inet_ntoa(ipcp->want_ipaddr));
LogPrintf(LogIPCP, "%s --> %s\n", tbuff2, inet_ntoa(ipaddr));
ipcp->want_ipaddr = ipaddr;
ipcp->his_ipaddr = dstipaddr;
break;
case MODE_REJ:
ipcp->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");
ipcp->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 = ipcp->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");
ipcp->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 = ipcp->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:
ipcp->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(struct bundle *bundle, 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
(bundle, &IpcpInfo, 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 && ipcp_SetIPaddress(bundle, &IpcpInfo,
IpcpInfo.DefMyAddress.ipaddr,
IpcpInfo.DefHisAddress.ipaddr, ifnetmask,
0) < 0) {
IpcpInfo.DefMyAddress.ipaddr.s_addr = INADDR_ANY;
IpcpInfo.DefHisAddress.ipaddr.s_addr = INADDR_ANY;
return 0;
}
} else
return 0;
return 1;
}
Reference in New Issue View Git Blame Copy Permalink