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ppp/pppdump/pppdump.c

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/*
* pppdump - print out the contents of a record file generated by
* pppd in readable form.
*
* Copyright (c) 1999 Paul Mackerras. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The name(s) of the authors of this software must not be used to
* endorse or promote products derived from this software without
* prior written permission.
*
* 4. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by Paul Mackerras
* <paulus@samba.org>".
*
* THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <time.h>
#include <sys/types.h>
#include "ppp_defs.h"
#include "ppp-comp.h"
int hexmode;
int pppmode;
int reverse;
int decompress;
int mru = 1500;
int abs_times;
time_t start_time;
int start_time_tenths;
int tot_sent, tot_rcvd;
extern int optind;
extern char *optarg;
void dumplog();
void dumpppp();
void show_time();
void handle_ccp();
int
main(ac, av)
int ac;
char **av;
{
int i;
char *p;
FILE *f;
while ((i = getopt(ac, av, "hprdm:a")) != -1) {
switch (i) {
case 'h':
hexmode = 1;
break;
case 'p':
pppmode = 1;
break;
case 'r':
reverse = 1;
break;
case 'd':
decompress = 1;
break;
case 'm':
mru = atoi(optarg);
break;
case 'a':
abs_times = 1;
break;
default:
fprintf(stderr, "Usage: %s [-h | -p[d]] [-r] [-m mru] [-a] [file ...]\n", av[0]);
exit(1);
}
}
if (optind >= ac)
dumplog(stdin);
else {
for (i = optind; i < ac; ++i) {
p = av[i];
if ((f = fopen(p, "r")) == NULL) {
perror(p);
exit(1);
}
if (pppmode)
dumpppp(f);
else
dumplog(f);
fclose(f);
}
}
exit(0);
}
void
dumplog(f)
FILE *f;
{
int c, n, k, col;
int nb, c2;
unsigned char buf[16];
while ((c = getc(f)) != EOF) {
switch (c) {
case 1:
case 2:
if (reverse)
c = 3 - c;
printf("%s %c", c==1? "sent": "rcvd", hexmode? ' ': '"');
col = 6;
n = getc(f);
n = (n << 8) + getc(f);
*(c==1? &tot_sent: &tot_rcvd) += n;
nb = 0;
for (; n > 0; --n) {
c = getc(f);
if (c == EOF) {
printf("\nEOF\n");
exit(0);
}
if (hexmode) {
if (nb >= 16) {
printf(" ");
for (k = 0; k < nb; ++k) {
c2 = buf[k];
putchar((' ' <= c2 && c2 <= '~')? c2: '.');
}
printf("\n ");
nb = 0;
}
buf[nb++] = c;
printf(" %.2x", c);
} else {
k = (' ' <= c && c <= '~')? (c != '\\' && c != '"')? 1: 2: 3;
if ((col += k) >= 78) {
printf("\n ");
col = 6 + k;
}
switch (k) {
case 1:
putchar(c);
break;
case 2:
printf("\\%c", c);
break;
case 3:
printf("\\%.2x", c);
break;
}
}
}
if (hexmode) {
for (k = nb; k < 16; ++k)
printf(" ");
printf(" ");
for (k = 0; k < nb; ++k) {
c2 = buf[k];
putchar((' ' <= c2 && c2 <= '~')? c2: '.');
}
} else
putchar('"');
printf("\n");
break;
case 3:
case 4:
printf("end %s\n", c==3? "send": "recv");
break;
case 5:
case 6:
case 7:
show_time(f, c);
break;
default:
printf("?%.2x\n", c);
}
}
}
/*
* 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
};
struct pkt {
int cnt;
int esc;
int flags;
struct compressor *comp;
void *state;
unsigned char buf[8192];
} spkt, rpkt;
/* Values for flags */
#define CCP_ISUP 1
#define CCP_ERROR 2
#define CCP_FATALERROR 4
#define CCP_ERR (CCP_ERROR | CCP_FATALERROR)
#define CCP_DECOMP_RUN 8
unsigned char dbuf[8192];
void
dumpppp(f)
FILE *f;
{
int c, n, k;
int nb, nl, dn, proto, rv;
char *dir, *q;
unsigned char *p, *r, *endp;
unsigned char *d;
unsigned short fcs;
struct pkt *pkt;
spkt.cnt = rpkt.cnt = 0;
spkt.esc = rpkt.esc = 0;
while ((c = getc(f)) != EOF) {
switch (c) {
case 1:
case 2:
if (reverse)
c = 3 - c;
dir = c==1? "sent": "rcvd";
pkt = c==1? &spkt: &rpkt;
n = getc(f);
n = (n << 8) + getc(f);
*(c==1? &tot_sent: &tot_rcvd) += n;
for (; n > 0; --n) {
c = getc(f);
switch (c) {
case EOF:
printf("\nEOF\n");
if (spkt.cnt > 0)
printf("[%d bytes in incomplete send packet]\n",
spkt.cnt);
if (rpkt.cnt > 0)
printf("[%d bytes in incomplete recv packet]\n",
rpkt.cnt);
exit(0);
case '~':
if (pkt->cnt > 0) {
q = dir;
if (pkt->esc) {
printf("%s aborted packet:\n ", dir);
q = " ";
}
nb = pkt->cnt;
p = pkt->buf;
pkt->cnt = 0;
pkt->esc = 0;
if (nb <= 2) {
printf("%s short packet [%d bytes]:", q, nb);
for (k = 0; k < nb; ++k)
printf(" %.2x", p[k]);
printf("\n");
break;
}
fcs = PPP_INITFCS;
for (k = 0; k < nb; ++k)
fcs = PPP_FCS(fcs, p[k]);
fcs &= 0xFFFF;
nb -= 2;
endp = p + nb;
r = p;
if (r[0] == 0xff && r[1] == 3)
r += 2;
if ((r[0] & 1) == 0)
++r;
++r;
if (endp - r > mru)
printf(" ERROR: length (%d) > MRU (%d)\n",
endp - r, mru);
if (decompress && fcs == PPP_GOODFCS) {
/* See if this is a CCP or compressed packet */
d = dbuf;
r = p;
if (r[0] == 0xff && r[1] == 3) {
*d++ = *r++;
*d++ = *r++;
}
proto = r[0];
if ((proto & 1) == 0)
proto = (proto << 8) + r[1];
if (proto == PPP_CCP) {
handle_ccp(pkt, r + 2, endp - r - 2);
} else if (proto == PPP_COMP) {
if ((pkt->flags & CCP_ISUP)
&& (pkt->flags & CCP_DECOMP_RUN)
&& pkt->state
&& (pkt->flags & CCP_ERR) == 0) {
rv = pkt->comp->decompress(pkt->state, r,
endp - r, d, &dn);
switch (rv) {
case DECOMP_OK:
p = dbuf;
nb = d + dn - p;
if ((d[0] & 1) == 0)
--dn;
--dn;
if (dn > mru)
printf(" ERROR: decompressed length (%d) > MRU (%d)\n", dn, mru);
break;
case DECOMP_ERROR:
printf(" DECOMPRESSION ERROR\n");
pkt->flags |= CCP_ERROR;
break;
case DECOMP_FATALERROR:
printf(" FATAL DECOMPRESSION ERROR\n");
pkt->flags |= CCP_FATALERROR;
break;
}
}
} else if (pkt->state
&& (pkt->flags & CCP_DECOMP_RUN)) {
pkt->comp->incomp(pkt->state, r, endp - r);
}
}
do {
nl = nb < 16? nb: 16;
printf("%s ", q);
for (k = 0; k < nl; ++k)
printf(" %.2x", p[k]);
for (; k < 16; ++k)
printf(" ");
printf(" ");
for (k = 0; k < nl; ++k) {
c = p[k];
putchar((' ' <= c && c <= '~')? c: '.');
}
printf("\n");
q = " ";
p += nl;
nb -= nl;
} while (nb > 0);
if (fcs != PPP_GOODFCS)
printf(" BAD FCS: (residue = %x)\n", fcs);
}
break;
case '}':
if (!pkt->esc) {
pkt->esc = 1;
break;
}
/* else fall through */
default:
if (pkt->esc) {
c ^= 0x20;
pkt->esc = 0;
}
pkt->buf[pkt->cnt++] = c;
break;
}
}
break;
case 3:
case 4:
if (reverse)
c = 7 - c;
dir = c==3? "send": "recv";
pkt = c==3? &spkt: &rpkt;
printf("end %s", dir);
if (pkt->cnt > 0)
printf(" [%d bytes in incomplete packet]", pkt->cnt);
printf("\n");
break;
case 5:
case 6:
case 7:
show_time(f, c);
break;
default:
printf("?%.2x\n", c);
}
}
}
extern struct compressor ppp_bsd_compress, ppp_deflate;
struct compressor *compressors[] = {
#if DO_BSD_COMPRESS
&ppp_bsd_compress,
#endif
#if DO_DEFLATE
&ppp_deflate,
#endif
NULL
};
void
handle_ccp(cp, dp, len)
struct pkt *cp;
u_char *dp;
int len;
{
int clen;
struct compressor **comp;
if (len < CCP_HDRLEN)
return;
clen = CCP_LENGTH(dp);
if (clen > len)
return;
switch (CCP_CODE(dp)) {
case CCP_CONFACK:
cp->flags &= ~(CCP_DECOMP_RUN | CCP_ISUP);
if (clen < CCP_HDRLEN + CCP_OPT_MINLEN
|| clen < CCP_HDRLEN + CCP_OPT_LENGTH(dp + CCP_HDRLEN))
break;
dp += CCP_HDRLEN;
clen -= CCP_HDRLEN;
for (comp = compressors; *comp != NULL; ++comp) {
if ((*comp)->compress_proto == dp[0]) {
if (cp->state != NULL) {
(*cp->comp->decomp_free)(cp->state);
cp->state = NULL;
}
cp->comp = *comp;
cp->state = (*comp)->decomp_alloc(dp, CCP_OPT_LENGTH(dp));
cp->flags |= CCP_ISUP;
if (cp->state != NULL
&& (*cp->comp->decomp_init)
(cp->state, dp, clen, 0, 0, 8192, 1))
cp->flags = (cp->flags & ~CCP_ERR) | CCP_DECOMP_RUN;
break;
}
}
break;
case CCP_CONFNAK:
case CCP_CONFREJ:
cp->flags &= ~(CCP_DECOMP_RUN | CCP_ISUP);
break;
case CCP_RESETACK:
if (cp->flags & CCP_ISUP) {
if (cp->state && (cp->flags & CCP_DECOMP_RUN)) {
(*cp->comp->decomp_reset)(cp->state);
cp->flags &= ~CCP_ERROR;
}
}
break;
}
}
void
show_time(f, c)
FILE *f;
int c;
{
time_t t;
int n;
struct tm *tm;
if (c == 7) {
t = getc(f);
t = (t << 8) + getc(f);
t = (t << 8) + getc(f);
t = (t << 8) + getc(f);
printf("start %s", ctime(&t));
start_time = t;
start_time_tenths = 0;
tot_sent = tot_rcvd = 0;
} else {
n = getc(f);
if (c == 5) {
for (c = 3; c > 0; --c)
n = (n << 8) + getc(f);
}
if (abs_times) {
n += start_time_tenths;
start_time += n / 10;
start_time_tenths = n % 10;
tm = localtime(&start_time);
printf("time %.2d:%.2d:%.2d.%d", tm->tm_hour, tm->tm_min,
tm->tm_sec, start_time_tenths);
printf(" (sent %d, rcvd %d)\n", tot_sent, tot_rcvd);
} else
printf("time %.1fs\n", (double) n / 10);
}
}
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