--- /dev/null
+/*
+ * pppdump - print out the contents of a record file generated by
+ * pppd in readable form.
+ *
+ * Copyright (C) 1999 Paul Mackerras. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include "ppp_defs.h"
+#include "ppp-comp.h"
+
+int hexmode;
+int pppmode;
+int reverse;
+int decompress;
+int mru = 1500;
+
+extern int optind;
+
+main(ac, av)
+ int ac;
+ char **av;
+{
+ int i;
+ char *p;
+ FILE *f;
+
+ while ((i = getopt(ac, av, "hprdm:")) != -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;
+ default:
+ fprintf(stderr, "Usage: %s [-h | -p[d]] [-r] [-m mru] [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);
+ }
+ dumplog(f);
+ fclose(f);
+ }
+ }
+ exit(0);
+}
+
+
+dumplog(f)
+ FILE *f;
+{
+ int c, n, k, col;
+ int nb, c2;
+ unsigned char buf[16];
+
+ if (pppmode) {
+ dumpppp(f);
+ return;
+ }
+ while ((c = getc(f)) != EOF) {
+ if (c == 1 || c == 2) {
+ if (reverse)
+ c = 3 - c;
+ printf("%s %c", c==1? "sent": "rcvd", hexmode? ' ': '"');
+ col = 6;
+ n = getc(f);
+ n = (n << 8) + getc(f);
+ 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");
+ } else if (c == 3 || c == 4) {
+ printf("end %s\n", c==3? "send": "recv");
+ } else if (c == 5 || c == 6) {
+ n = getc(f);
+ if (c == 5) {
+ for (c = 3; c > 0; --c)
+ n = (n << 8) + getc(f);
+ }
+ printf("time %.1fs\n", (double) n / 10);
+ } else {
+ printf("?%.2x\n");
+ }
+ }
+ exit(0);
+}
+
+/*
+ * 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];
+
+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) {
+ if (c == 1 || c == 2) {
+ if (reverse)
+ c = 3 - c;
+ dir = c==1? "sent": "rcvd";
+ pkt = c==1? &spkt: &rpkt;
+ n = getc(f);
+ n = (n << 8) + getc(f);
+ 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;
+ }
+ }
+ } else if (c == 3 || c == 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");
+ } else if (c == 5 || c == 6) {
+ n = getc(f);
+ if (c == 5) {
+ for (c = 3; c > 0; --c)
+ n = (n << 8) + getc(f);
+ }
+ printf("time %.1fs\n", (double) n / 10);
+ } else {
+ printf("?%.2x\n");
+ }
+ }
+}
+
+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
+};
+
+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;
+ }
+}
projects / ppp.git / blobdiff