auto import from //depot/cupcake/@135843
diff --git a/print-chdlc.c b/print-chdlc.c
new file mode 100644
index 0000000..b7654f5
--- /dev/null
+++ b/print-chdlc.c
@@ -0,0 +1,215 @@
+/*
+ * Copyright (c) 1990, 1991, 1993, 1994, 1995, 1996, 1997
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may 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
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+ "@(#) $Header: /tcpdump/master/tcpdump/print-chdlc.c,v 1.32.2.11 2005/11/29 08:57:10 hannes Exp $ (LBL)";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <pcap.h>
+#include <stdio.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "ethertype.h"
+#include "extract.h"
+#include "ppp.h"
+#include "chdlc.h"
+
+static void chdlc_slarp_print(const u_char *, u_int);
+
+const struct tok chdlc_cast_values[] = {
+ { CHDLC_UNICAST, "unicast" },
+ { CHDLC_BCAST, "bcast" },
+ { 0, NULL}
+};
+
+
+/* Standard CHDLC printer */
+u_int
+chdlc_if_print(const struct pcap_pkthdr *h, register const u_char *p)
+{
+ register u_int length = h->len;
+ register u_int caplen = h->caplen;
+
+ if (caplen < CHDLC_HDRLEN) {
+ printf("[|chdlc]");
+ return (caplen);
+ }
+ return (chdlc_print(p,length));
+}
+
+u_int
+chdlc_print(register const u_char *p, u_int length) {
+ u_int proto;
+
+ proto = EXTRACT_16BITS(&p[2]);
+ if (eflag) {
+ printf("%s, ethertype %s (0x%04x), length %u: ",
+ tok2str(chdlc_cast_values, "0x%02x", p[0]),
+ tok2str(ethertype_values, "Unknown", proto),
+ proto,
+ length);
+ }
+
+ length -= CHDLC_HDRLEN;
+ p += CHDLC_HDRLEN;
+
+ switch (proto) {
+ case ETHERTYPE_IP:
+ ip_print(gndo, p, length);
+ break;
+#ifdef INET6
+ case ETHERTYPE_IPV6:
+ ip6_print(p, length);
+ break;
+#endif
+ case CHDLC_TYPE_SLARP:
+ chdlc_slarp_print(p, length);
+ break;
+#if 0
+ case CHDLC_TYPE_CDP:
+ chdlc_cdp_print(p, length);
+ break;
+#endif
+ case ETHERTYPE_MPLS:
+ case ETHERTYPE_MPLS_MULTI:
+ mpls_print(p, length);
+ break;
+ case ETHERTYPE_ISO:
+ /* is the fudge byte set ? lets verify by spotting ISO headers */
+ if (*(p+1) == 0x81 ||
+ *(p+1) == 0x82 ||
+ *(p+1) == 0x83)
+ isoclns_print(p+1, length-1, length-1);
+ else
+ isoclns_print(p, length, length);
+ break;
+ default:
+ if (!eflag)
+ printf("unknown CHDLC protocol (0x%04x)", proto);
+ break;
+ }
+
+ return (CHDLC_HDRLEN);
+}
+
+/*
+ * The fixed-length portion of a SLARP packet.
+ */
+struct cisco_slarp {
+ u_int8_t code[4];
+#define SLARP_REQUEST 0
+#define SLARP_REPLY 1
+#define SLARP_KEEPALIVE 2
+ union {
+ struct {
+ u_int8_t addr[4];
+ u_int8_t mask[4];
+ } addr;
+ struct {
+ u_int8_t myseq[4];
+ u_int8_t yourseq[4];
+ u_int8_t rel[2];
+ } keep;
+ } un;
+};
+
+#define SLARP_MIN_LEN 14
+#define SLARP_MAX_LEN 18
+
+static void
+chdlc_slarp_print(const u_char *cp, u_int length)
+{
+ const struct cisco_slarp *slarp;
+ u_int sec,min,hrs,days;
+
+ printf("SLARP (length: %u), ",length);
+ if (length < SLARP_MIN_LEN)
+ goto trunc;
+
+ slarp = (const struct cisco_slarp *)cp;
+ TCHECK2(*slarp, SLARP_MIN_LEN);
+ switch (EXTRACT_32BITS(&slarp->code)) {
+ case SLARP_REQUEST:
+ printf("request");
+ /*
+ * At least according to William "Chops" Westfield's
+ * message in
+ *
+ * http://www.nethelp.no/net/cisco-hdlc.txt
+ *
+ * the address and mask aren't used in requests -
+ * they're just zero.
+ */
+ break;
+ case SLARP_REPLY:
+ printf("reply %s/%s",
+ ipaddr_string(&slarp->un.addr.addr),
+ ipaddr_string(&slarp->un.addr.mask));
+ break;
+ case SLARP_KEEPALIVE:
+ printf("keepalive: mineseen=0x%08x, yourseen=0x%08x, reliability=0x%04x",
+ EXTRACT_32BITS(&slarp->un.keep.myseq),
+ EXTRACT_32BITS(&slarp->un.keep.yourseq),
+ EXTRACT_16BITS(&slarp->un.keep.rel));
+
+ if (length >= SLARP_MAX_LEN) { /* uptime-stamp is optional */
+ cp += SLARP_MIN_LEN;
+ if (!TTEST2(*cp, 4))
+ goto trunc;
+ sec = EXTRACT_32BITS(cp) / 1000;
+ min = sec / 60; sec -= min * 60;
+ hrs = min / 60; min -= hrs * 60;
+ days = hrs / 24; hrs -= days * 24;
+ printf(", link uptime=%ud%uh%um%us",days,hrs,min,sec);
+ }
+ break;
+ default:
+ printf("0x%02x unknown", EXTRACT_32BITS(&slarp->code));
+ if (vflag <= 1)
+ print_unknown_data(cp+4,"\n\t",length-4);
+ break;
+ }
+
+ if (SLARP_MAX_LEN < length && vflag)
+ printf(", (trailing junk: %d bytes)", length - SLARP_MAX_LEN);
+ if (vflag > 1)
+ print_unknown_data(cp+4,"\n\t",length-4);
+ return;
+
+trunc:
+ printf("[|slarp]");
+}
+
+
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */