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Peter Wemm 1997-08-19 14:29:39 +00:00
parent 2d4b190bc5
commit 9c08ff38e5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=28416
7 changed files with 2648 additions and 0 deletions
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430
usr.sbin/pppd/cbcp.c Normal file
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/*
* cbcp - Call Back Configuration Protocol.
*
* Copyright (c) 1995 Pedro Roque Marques
* All rights reserved.
*
* 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 Pedro Roque Marques. The name of the author 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.
*/
#ifndef lint
static char rcsid[] = "$Id: cbcp.c,v 1.2 1997/04/30 05:50:26 paulus Exp $";
#endif
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <syslog.h>
#include "pppd.h"
#include "cbcp.h"
#include "fsm.h"
#include "lcp.h"
#include "ipcp.h"
/*
* Protocol entry points.
*/
static void cbcp_init __P((int unit));
static void cbcp_open __P((int unit));
static void cbcp_lowerup __P((int unit));
static void cbcp_input __P((int unit, u_char *pkt, int len));
static void cbcp_protrej __P((int unit));
static int cbcp_printpkt __P((u_char *pkt, int len,
void (*printer) __P((void *, char *, ...)),
void *arg));
struct protent cbcp_protent = {
PPP_CBCP,
cbcp_init,
cbcp_input,
cbcp_protrej,
cbcp_lowerup,
NULL,
cbcp_open,
NULL,
cbcp_printpkt,
NULL,
0,
"CBCP",
NULL,
NULL,
NULL
};
cbcp_state cbcp[NUM_PPP];
/* internal prototypes */
static void cbcp_recvreq __P((cbcp_state *us, char *pckt, int len));
static void cbcp_resp __P((cbcp_state *us));
static void cbcp_up __P((cbcp_state *us));
static void cbcp_recvack __P((cbcp_state *us, char *pckt, int len));
static void cbcp_send __P((cbcp_state *us, u_char code, u_char *buf, int len));
/* init state */
static void
cbcp_init(iface)
int iface;
{
cbcp_state *us;
us = &cbcp[iface];
memset(us, 0, sizeof(cbcp_state));
us->us_unit = iface;
us->us_type |= (1 << CB_CONF_NO);
}
/* lower layer is up */
static void
cbcp_lowerup(iface)
int iface;
{
cbcp_state *us = &cbcp[iface];
syslog(LOG_DEBUG, "cbcp_lowerup");
syslog(LOG_DEBUG, "want: %d", us->us_type);
if (us->us_type == CB_CONF_USER)
syslog(LOG_DEBUG, "phone no: %s", us->us_number);
}
static void
cbcp_open(unit)
int unit;
{
syslog(LOG_DEBUG, "cbcp_open");
}
/* process an incomming packet */
static void
cbcp_input(unit, inpacket, pktlen)
int unit;
u_char *inpacket;
int pktlen;
{
u_char *inp;
u_char code, id;
u_short len;
cbcp_state *us = &cbcp[unit];
inp = inpacket;
if (pktlen < CBCP_MINLEN) {
syslog(LOG_ERR, "CBCP packet is too small");
return;
}
GETCHAR(code, inp);
GETCHAR(id, inp);
GETSHORT(len, inp);
#if 0
if (len > pktlen) {
syslog(LOG_ERR, "CBCP packet: invalid length");
return;
}
#endif
len -= CBCP_MINLEN;
switch(code) {
case CBCP_REQ:
us->us_id = id;
cbcp_recvreq(us, inp, len);
break;
case CBCP_RESP:
syslog(LOG_DEBUG, "CBCP_RESP received");
break;
case CBCP_ACK:
if (id != us->us_id)
syslog(LOG_DEBUG, "id doesn't match: expected %d recv %d",
us->us_id, id);
cbcp_recvack(us, inp, len);
break;
default:
break;
}
}
/* protocol was rejected by foe */
void cbcp_protrej(int iface)
{
}
char *cbcp_codenames[] = {
"Request", "Response", "Ack"
};
char *cbcp_optionnames[] = {
"NoCallback",
"UserDefined",
"AdminDefined",
"List"
};
/* pretty print a packet */
static int
cbcp_printpkt(p, plen, printer, arg)
u_char *p;
int plen;
void (*printer) __P((void *, char *, ...));
void *arg;
{
int code, opt, id, len, olen, delay;
u_char *pstart;
if (plen < HEADERLEN)
return 0;
pstart = p;
GETCHAR(code, p);
GETCHAR(id, p);
GETSHORT(len, p);
if (len < HEADERLEN || len > plen)
return 0;
if (code >= 1 && code <= sizeof(cbcp_codenames) / sizeof(char *))
printer(arg, " %s", cbcp_codenames[code-1]);
else
printer(arg, " code=0x%x", code);
printer(arg, " id=0x%x", id);
len -= HEADERLEN;
switch (code) {
case CBCP_REQ:
case CBCP_RESP:
case CBCP_ACK:
while(len >= 2) {
GETCHAR(opt, p);
GETCHAR(olen, p);
if (olen < 2 || olen > len) {
break;
}
printer(arg, " <");
len -= olen;
if (opt >= 1 && opt <= sizeof(cbcp_optionnames) / sizeof(char *))
printer(arg, " %s", cbcp_optionnames[opt-1]);
else
printer(arg, " option=0x%x", opt);
if (olen > 2) {
GETCHAR(delay, p);
printer(arg, " delay = %d", delay);
}
if (olen > 3) {
int addrt;
char str[256];
GETCHAR(addrt, p);
memcpy(str, p, olen - 4);
str[olen - 4] = 0;
printer(arg, " number = %s", str);
}
printer(arg, ">");
break;
}
default:
break;
}
for (; len > 0; --len) {
GETCHAR(code, p);
printer(arg, " %.2x", code);
}
return p - pstart;
}
/* received CBCP request */
static void
cbcp_recvreq(us, pckt, pcktlen)
cbcp_state *us;
char *pckt;
int pcktlen;
{
u_char type, opt_len, delay, addr_type;
char address[256];
int len = pcktlen;
address[0] = 0;
while (len) {
syslog(LOG_DEBUG, "length: %d", len);
GETCHAR(type, pckt);
GETCHAR(opt_len, pckt);
if (opt_len > 2)
GETCHAR(delay, pckt);
us->us_allowed |= (1 << type);
switch(type) {
case CB_CONF_NO:
syslog(LOG_DEBUG, "no callback allowed");
break;
case CB_CONF_USER:
syslog(LOG_DEBUG, "user callback allowed");
if (opt_len > 4) {
GETCHAR(addr_type, pckt);
memcpy(address, pckt, opt_len - 4);
address[opt_len - 4] = 0;
if (address[0])
syslog(LOG_DEBUG, "address: %s", address);
}
break;
case CB_CONF_ADMIN:
syslog(LOG_DEBUG, "user admin defined allowed");
break;
case CB_CONF_LIST:
break;
}
len -= opt_len;
}
cbcp_resp(us);
}
static void
cbcp_resp(us)
cbcp_state *us;
{
u_char cb_type;
u_char buf[256];
u_char *bufp = buf;
int len = 0;
cb_type = us->us_allowed & us->us_type;
syslog(LOG_DEBUG, "cbcp_resp cb_type=%d", cb_type);
#if 0
if (!cb_type)
lcp_down(us->us_unit);
#endif
if (cb_type & ( 1 << CB_CONF_USER ) ) {
syslog(LOG_DEBUG, "cbcp_resp CONF_USER");
PUTCHAR(CB_CONF_USER, bufp);
len = 3 + 1 + strlen(us->us_number) + 1;
PUTCHAR(len , bufp);
PUTCHAR(5, bufp); /* delay */
PUTCHAR(1, bufp);
BCOPY(us->us_number, bufp, strlen(us->us_number) + 1);
cbcp_send(us, CBCP_RESP, buf, len);
return;
}
if (cb_type & ( 1 << CB_CONF_ADMIN ) ) {
syslog(LOG_DEBUG, "cbcp_resp CONF_ADMIN");
PUTCHAR(CB_CONF_ADMIN, bufp);
len = 3 + 1;
PUTCHAR(len , bufp);
PUTCHAR(5, bufp); /* delay */
PUTCHAR(0, bufp);
cbcp_send(us, CBCP_RESP, buf, len);
return;
}
if (cb_type & ( 1 << CB_CONF_NO ) ) {
syslog(LOG_DEBUG, "cbcp_resp CONF_NO");
PUTCHAR(CB_CONF_NO, bufp);
len = 3;
PUTCHAR(len , bufp);
PUTCHAR(0, bufp);
cbcp_send(us, CBCP_RESP, buf, len);
(*ipcp_protent.open)(us->us_unit);
return;
}
}
static void
cbcp_send(us, code, buf, len)
cbcp_state *us;
u_char code;
u_char *buf;
int len;
{
u_char *outp;
int outlen;
outp = outpacket_buf;
outlen = 4 + len;
MAKEHEADER(outp, PPP_CBCP);
PUTCHAR(code, outp);
PUTCHAR(us->us_id, outp);
PUTSHORT(outlen, outp);
if (len)
BCOPY(buf, outp, len);
output(us->us_unit, outpacket_buf, outlen + PPP_HDRLEN);
}
static void
cbcp_recvack(us, pckt, len)
cbcp_state *us;
char *pckt;
int len;
{
u_char type, delay, addr_type;
int opt_len;
char address[256];
if (len) {
GETCHAR(type, pckt);
GETCHAR(opt_len, pckt);
if (opt_len > 2)
GETCHAR(delay, pckt);
if (opt_len > 4) {
GETCHAR(addr_type, pckt);
memcpy(address, pckt, opt_len - 4);
address[opt_len - 4] = 0;
if (address[0])
syslog(LOG_DEBUG, "peer will call: %s", address);
}
}
cbcp_up(us);
}
extern int persist;
/* ok peer will do callback */
static void
cbcp_up(us)
cbcp_state *us;
{
persist = 0;
lcp_close(0, "Call me back, please");
}

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#ifndef CBCP_H
#define CBCP_H
typedef struct cbcp_state {
int us_unit; /* Interface unit number */
u_char us_id; /* Current id */
u_char us_allowed;
int us_type;
char *us_number; /* Telefone Number */
} cbcp_state;
extern cbcp_state cbcp[];
extern struct protent cbcp_protent;
#define CBCP_MINLEN 4
#define CBCP_REQ 1
#define CBCP_RESP 2
#define CBCP_ACK 3
#define CB_CONF_NO 1
#define CB_CONF_USER 2
#define CB_CONF_ADMIN 3
#define CB_CONF_LIST 4
#endif

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usr.sbin/pppd/chap_ms.c Normal file
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/*
* chap_ms.c - Microsoft MS-CHAP compatible implementation.
*
* Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
* http://www.strataware.com/
*
* All rights reserved.
*
* 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 Eric Rosenquist. The name of the author 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.
*/
/*
* Modifications by Lauri Pesonen / lpesonen@clinet.fi, april 1997
*
* Implemented LANManager type password response to MS-CHAP challenges.
* Now pppd provides both NT style and LANMan style blocks, and the
* prefered is set by option "ms-lanman". Default is to use NT.
* The hash text (StdText) was taken from Win95 RASAPI32.DLL.
*
* You should also use DOMAIN\\USERNAME as described in README.MSCHAP80
*/
#ifndef lint
static char rcsid[] = "$Id: chap_ms.c,v 1.4 1997/05/22 06:46:19 paulus Exp $";
#endif
#ifdef CHAPMS
#include <stdio.h>
#include <sys/types.h>
#include <sys/time.h>
#include <syslog.h>
#include "pppd.h"
#include "chap.h"
#include "chap_ms.h"
#include "md4.h"
#ifndef USE_CRYPT
#include <des.h>
#endif
typedef struct {
u_char LANManResp[24];
u_char NTResp[24];
u_char UseNT; /* If 1, ignore the LANMan response field */
} MS_ChapResponse;
/* We use MS_CHAP_RESPONSE_LEN, rather than sizeof(MS_ChapResponse),
in case this struct gets padded. */
static void DesEncrypt __P((u_char *, u_char *, u_char *));
static void MakeKey __P((u_char *, u_char *));
#ifdef USE_CRYPT
static void Expand __P((u_char *, u_char *));
static void Collapse __P((u_char *, u_char *));
#endif
static void
ChallengeResponse(challenge, pwHash, response)
u_char *challenge; /* IN 8 octets */
u_char *pwHash; /* IN 16 octets */
u_char *response; /* OUT 24 octets */
{
char ZPasswordHash[21];
BZERO(ZPasswordHash, sizeof(ZPasswordHash));
BCOPY(pwHash, ZPasswordHash, 16);
#if 0
log_packet(ZPasswordHash, sizeof(ZPasswordHash), "ChallengeResponse - ZPasswordHash", LOG_DEBUG);
#endif
DesEncrypt(challenge, ZPasswordHash + 0, response + 0);
DesEncrypt(challenge, ZPasswordHash + 7, response + 8);
DesEncrypt(challenge, ZPasswordHash + 14, response + 16);
#if 0
log_packet(response, 24, "ChallengeResponse - response", LOG_DEBUG);
#endif
}
#ifdef USE_CRYPT
static void
DesEncrypt(clear, key, cipher)
u_char *clear; /* IN 8 octets */
u_char *key; /* IN 7 octets */
u_char *cipher; /* OUT 8 octets */
{
u_char des_key[8];
u_char crypt_key[66];
u_char des_input[66];
MakeKey(key, des_key);
Expand(des_key, crypt_key);
setkey(crypt_key);
#if 0
CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X",
clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
#endif
Expand(clear, des_input);
encrypt(des_input, 0);
Collapse(des_input, cipher);
#if 0
CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X",
cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
#endif
}
#else /* USE_CRYPT */
static void
DesEncrypt(clear, key, cipher)
u_char *clear; /* IN 8 octets */
u_char *key; /* IN 7 octets */
u_char *cipher; /* OUT 8 octets */
{
des_cblock des_key;
des_key_schedule key_schedule;
MakeKey(key, des_key);
des_set_key(&des_key, key_schedule);
#if 0
CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet input : %02X%02X%02X%02X%02X%02X%02X%02X",
clear[0], clear[1], clear[2], clear[3], clear[4], clear[5], clear[6], clear[7]));
#endif
des_ecb_encrypt((des_cblock *)clear, (des_cblock *)cipher, key_schedule, 1);
#if 0
CHAPDEBUG((LOG_INFO, "DesEncrypt: 8 octet output: %02X%02X%02X%02X%02X%02X%02X%02X",
cipher[0], cipher[1], cipher[2], cipher[3], cipher[4], cipher[5], cipher[6], cipher[7]));
#endif
}
#endif /* USE_CRYPT */
static u_char Get7Bits(input, startBit)
u_char *input;
int startBit;
{
register unsigned int word;
word = (unsigned)input[startBit / 8] << 8;
word |= (unsigned)input[startBit / 8 + 1];
word >>= 15 - (startBit % 8 + 7);
return word & 0xFE;
}
#ifdef USE_CRYPT
/* in == 8-byte string (expanded version of the 56-bit key)
* out == 64-byte string where each byte is either 1 or 0
* Note that the low-order "bit" is always ignored by by setkey()
*/
static void Expand(in, out)
u_char *in;
u_char *out;
{
int j, c;
int i;
for(i = 0; i < 64; in++){
c = *in;
for(j = 7; j >= 0; j--)
*out++ = (c >> j) & 01;
i += 8;
}
}
/* The inverse of Expand
*/
static void Collapse(in, out)
u_char *in;
u_char *out;
{
int j;
int i;
unsigned int c;
for (i = 0; i < 64; i += 8, out++) {
c = 0;
for (j = 7; j >= 0; j--, in++)
c |= *in << j;
*out = c & 0xff;
}
}
#endif
static void MakeKey(key, des_key)
u_char *key; /* IN 56 bit DES key missing parity bits */
u_char *des_key; /* OUT 64 bit DES key with parity bits added */
{
des_key[0] = Get7Bits(key, 0);
des_key[1] = Get7Bits(key, 7);
des_key[2] = Get7Bits(key, 14);
des_key[3] = Get7Bits(key, 21);
des_key[4] = Get7Bits(key, 28);
des_key[5] = Get7Bits(key, 35);
des_key[6] = Get7Bits(key, 42);
des_key[7] = Get7Bits(key, 49);
#ifndef USE_CRYPT
des_set_odd_parity((des_cblock *)des_key);
#endif
#if 0
CHAPDEBUG((LOG_INFO, "MakeKey: 56-bit input : %02X%02X%02X%02X%02X%02X%02X",
key[0], key[1], key[2], key[3], key[4], key[5], key[6]));
CHAPDEBUG((LOG_INFO, "MakeKey: 64-bit output: %02X%02X%02X%02X%02X%02X%02X%02X",
des_key[0], des_key[1], des_key[2], des_key[3], des_key[4], des_key[5], des_key[6], des_key[7]));
#endif
}
static void
ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, response)
char *rchallenge;
int rchallenge_len;
char *secret;
int secret_len;
MS_ChapResponse *response;
{
int i;
MDstruct md4Context;
u_char unicodePassword[MAX_NT_PASSWORD * 2];
static int low_byte_first = -1;
/* Initialize the Unicode version of the secret (== password). */
/* This implicitly supports 8-bit ISO8859/1 characters. */
BZERO(unicodePassword, sizeof(unicodePassword));
for (i = 0; i < secret_len; i++)
unicodePassword[i * 2] = (u_char)secret[i];
MDbegin(&md4Context);
MDupdate(&md4Context, unicodePassword, secret_len * 2 * 8); /* Unicode is 2 bytes/char, *8 for bit count */
if (low_byte_first == -1)
low_byte_first = (htons((unsigned short int)1) != 1);
if (low_byte_first == 0)
MDreverse(&md4Context); /* sfb 961105 */
MDupdate(&md4Context, NULL, 0); /* Tell MD4 we're done */
ChallengeResponse(rchallenge, (char *)md4Context.buffer, response->NTResp);
}
#ifdef MSLANMAN
static u_char *StdText = (u_char *)"KGS!@#$%"; /* key from rasapi32.dll */
static ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, response)
char *rchallenge;
int rchallenge_len;
char *secret;
int secret_len;
MS_ChapResponse *response;
{
int i;
u_char UcasePassword[MAX_NT_PASSWORD]; /* max is actually 14 */
u_char PasswordHash[16];
/* LANMan password is case insensitive */
BZERO(UcasePassword, sizeof(UcasePassword));
for (i = 0; i < secret_len; i++)
UcasePassword[i] = (u_char)toupper(secret[i]);
DesEncrypt( StdText, UcasePassword + 0, PasswordHash + 0 );
DesEncrypt( StdText, UcasePassword + 7, PasswordHash + 8 );
ChallengeResponse(rchallenge, PasswordHash, response->LANManResp);
}
#endif
void
ChapMS(cstate, rchallenge, rchallenge_len, secret, secret_len)
chap_state *cstate;
char *rchallenge;
int rchallenge_len;
char *secret;
int secret_len;
{
MS_ChapResponse response;
#ifdef MSLANMAN
extern int ms_lanman;
#endif
#if 0
CHAPDEBUG((LOG_INFO, "ChapMS: secret is '%.*s'", secret_len, secret));
#endif
BZERO(&response, sizeof(response));
/* Calculate both always */
ChapMS_NT(rchallenge, rchallenge_len, secret, secret_len, &response);
#ifdef MSLANMAN
ChapMS_LANMan(rchallenge, rchallenge_len, secret, secret_len, &response);
/* prefered method is set by option */
response.UseNT = !ms_lanman;
#else
response.UseNT = 1;
#endif
BCOPY(&response, cstate->response, MS_CHAP_RESPONSE_LEN);
cstate->resp_length = MS_CHAP_RESPONSE_LEN;
}
#endif /* CHAPMS */

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/*
* chap.h - Challenge Handshake Authentication Protocol definitions.
*
* Copyright (c) 1995 Eric Rosenquist, Strata Software Limited.
* http://www.strataware.com/
*
* All rights reserved.
*
* 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 Eric Rosenquist. The name of the author 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: chap_ms.h,v 1.1 1996/05/28 00:42:31 paulus Exp $
*/
#ifndef __CHAPMS_INCLUDE__
#define MAX_NT_PASSWORD 256 /* Maximum number of (Unicode) chars in an NT password */
void ChapMS __P((chap_state *, char *, int, char *, int));
#define __CHAPMS_INCLUDE__
#endif /* __CHAPMS_INCLUDE__ */

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/*
* demand.c - Support routines for demand-dialling.
*
* Copyright (c) 1993 The Australian National University.
* All rights reserved.
*
* 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 Australian National University. The name of the University
* 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.
*/
#ifndef lint
static char rcsid[] = "$Id: demand.c,v 1.6 1997/04/30 05:51:56 paulus Exp $";
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <syslog.h>
#include <netdb.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <net/if.h>
#ifdef PPP_FILTER
#include <net/bpf.h>
#include <pcap.h>
#endif
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
#include "lcp.h"
char *frame;
int framelen;
int framemax;
int escape_flag;
int flush_flag;
int fcs;
struct packet {
int length;
struct packet *next;
unsigned char data[1];
};
struct packet *pend_q;
struct packet *pend_qtail;
static int active_packet __P((unsigned char *, int));
/*
* demand_conf - configure the interface for doing dial-on-demand.
*/
void
demand_conf()
{
int i;
struct protent *protp;
/* framemax = lcp_allowoptions[0].mru;
if (framemax < PPP_MRU) */
framemax = PPP_MRU;
framemax += PPP_HDRLEN + PPP_FCSLEN;
frame = malloc(framemax);
if (frame == NULL)
novm("demand frame");
framelen = 0;
pend_q = NULL;
escape_flag = 0;
flush_flag = 0;
fcs = PPP_INITFCS;
ppp_send_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
ppp_recv_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
#ifdef PPP_FILTER
set_filters(&pass_filter, &active_filter);
#endif
/*
* Call the demand_conf procedure for each protocol that's got one.
*/
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->enabled_flag && protp->demand_conf != NULL)
if (!((*protp->demand_conf)(0)))
die(1);
}
/*
* demand_block - set each network protocol to block further packets.
*/
void
demand_block()
{
int i;
struct protent *protp;
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->enabled_flag && protp->demand_conf != NULL)
sifnpmode(0, protp->protocol & ~0x8000, NPMODE_QUEUE);
get_loop_output();
}
/*
* demand_discard - set each network protocol to discard packets
* with an error.
*/
void
demand_discard()
{
struct packet *pkt, *nextpkt;
int i;
struct protent *protp;
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->enabled_flag && protp->demand_conf != NULL)
sifnpmode(0, protp->protocol & ~0x8000, NPMODE_ERROR);
get_loop_output();
/* discard all saved packets */
for (pkt = pend_q; pkt != NULL; pkt = nextpkt) {
nextpkt = pkt->next;
free(pkt);
}
pend_q = NULL;
framelen = 0;
flush_flag = 0;
escape_flag = 0;
fcs = PPP_INITFCS;
}
/*
* demand_unblock - set each enabled network protocol to pass packets.
*/
void
demand_unblock()
{
int i;
struct protent *protp;
for (i = 0; (protp = protocols[i]) != NULL; ++i)
if (protp->enabled_flag && protp->demand_conf != NULL)
sifnpmode(0, protp->protocol & ~0x8000, NPMODE_PASS);
}
/*
* FCS lookup table as calculated by genfcstab.
*/
static u_short fcstab[256] = {
0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78
};
/*
* loop_chars - process characters received from the loopback.
* Calls loop_frame when a complete frame has been accumulated.
* Return value is 1 if we need to bring up the link, 0 otherwise.
*/
int
loop_chars(p, n)
unsigned char *p;
int n;
{
int c, rv;
rv = 0;
for (; n > 0; --n) {
c = *p++;
if (c == PPP_FLAG) {
if (!escape_flag && !flush_flag
&& framelen > 2 && fcs == PPP_GOODFCS) {
framelen -= 2;
if (loop_frame(frame, framelen))
rv = 1;
}
framelen = 0;
flush_flag = 0;
escape_flag = 0;
fcs = PPP_INITFCS;
continue;
}
if (flush_flag)
continue;
if (escape_flag) {
c ^= PPP_TRANS;
escape_flag = 0;
} else if (c == PPP_ESCAPE) {
escape_flag = 1;
continue;
}
if (framelen >= framemax) {
flush_flag = 1;
continue;
}
frame[framelen++] = c;
fcs = PPP_FCS(fcs, c);
}
return rv;
}
/*
* loop_frame - given a frame obtained from the loopback,
* decide whether to bring up the link or not, and, if we want
* to transmit this frame later, put it on the pending queue.
* Return value is 1 if we need to bring up the link, 0 otherwise.
* We assume that the kernel driver has already applied the
* pass_filter, so we won't get packets it rejected.
* We apply the active_filter to see if we want this packet to
* bring up the link.
*/
int
loop_frame(frame, len)
unsigned char *frame;
int len;
{
struct packet *pkt;
/* log_packet(frame, len, "from loop: ", LOG_DEBUG); */
if (len < PPP_HDRLEN)
return 0;
if ((PPP_PROTOCOL(frame) & 0x8000) != 0)
return 0; /* shouldn't get any of these anyway */
if (!active_packet(frame, len))
return 0;
pkt = (struct packet *) malloc(sizeof(struct packet) + len);
if (pkt != NULL) {
pkt->length = len;
pkt->next = NULL;
memcpy(pkt->data, frame, len);
if (pend_q == NULL)
pend_q = pkt;
else
pend_qtail->next = pkt;
pend_qtail = pkt;
}
return 1;
}
/*
* demand_rexmit - Resend all those frames which we got via the
* loopback, now that the real serial link is up.
*/
void
demand_rexmit(proto)
int proto;
{
struct packet *pkt, *prev, *nextpkt;
prev = NULL;
pkt = pend_q;
pend_q = NULL;
for (; pkt != NULL; pkt = nextpkt) {
nextpkt = pkt->next;
if (PPP_PROTOCOL(pkt->data) == proto) {
output(0, pkt->data, pkt->length);
free(pkt);
} else {
if (prev == NULL)
pend_q = pkt;
else
prev->next = pkt;
prev = pkt;
}
}
pend_qtail = prev;
if (prev != NULL)
prev->next = NULL;
}
/*
* Scan a packet to decide whether it is an "active" packet,
* that is, whether it is worth bringing up the link for.
*/
static int
active_packet(p, len)
unsigned char *p;
int len;
{
int proto, i;
struct protent *protp;
if (len < PPP_HDRLEN)
return 0;
proto = PPP_PROTOCOL(p);
#ifdef PPP_FILTER
if (active_filter.bf_len != 0
&& bpf_filter(active_filter.bf_insns, frame, len, len) == 0)
return 0;
#endif
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol < 0xC000 && (protp->protocol & ~0x8000) == proto) {
if (!protp->enabled_flag)
return 0;
if (protp->active_pkt == NULL)
return 1;
return (*protp->active_pkt)(p, len);
}
}
return 0; /* not a supported protocol !!?? */
}

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71
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/*
* ipxcp.h - IPX Control Protocol definitions.
*
* Copyright (c) 1989 Carnegie Mellon University.
* All rights reserved.
*
* 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 Carnegie Mellon University. The name of the
* University 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: ipxcp.h,v 1.3 1997/03/04 03:39:33 paulus Exp $
*/
/*
* Options.
*/
#define IPX_NETWORK_NUMBER 1 /* IPX Network Number */
#define IPX_NODE_NUMBER 2
#define IPX_COMPRESSION_PROTOCOL 3
#define IPX_ROUTER_PROTOCOL 4
#define IPX_ROUTER_NAME 5
#define IPX_COMPLETE 6
/* Values for the router protocol */
#define IPX_NONE 0
#define RIP_SAP 2
#define NLSP 4
typedef struct ipxcp_options {
int neg_node : 1; /* Negotiate IPX node number? */
int req_node : 1; /* Ask peer to send IPX node number? */
int neg_nn : 1; /* Negotiate IPX network number? */
int req_nn : 1; /* Ask peer to send IPX network number */
int neg_name : 1; /* Negotiate IPX router name */
int neg_complete : 1; /* Negotiate completion */
int neg_router : 1; /* Negotiate IPX router number */
int accept_local : 1; /* accept peer's value for ournode */
int accept_remote : 1; /* accept peer's value for hisnode */
int accept_network : 1; /* accept network number */
int tried_nlsp : 1; /* I have suggested NLSP already */
int tried_rip : 1; /* I have suggested RIP/SAP already */
u_int32_t his_network; /* base network number */
u_int32_t our_network; /* our value for network number */
u_int32_t network; /* the final network number */
u_char his_node[6]; /* peer's node number */
u_char our_node[6]; /* our node number */
u_char name [48]; /* name of the router */
int router; /* routing protocol */
} ipxcp_options;
extern fsm ipxcp_fsm[];
extern ipxcp_options ipxcp_wantoptions[];
extern ipxcp_options ipxcp_gotoptions[];
extern ipxcp_options ipxcp_allowoptions[];
extern ipxcp_options ipxcp_hisoptions[];
extern struct protent ipxcp_protent;