2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that: (1) source code distributions
7 * retain the above copyright notice and this paragraph in its entirety, (2)
8 * distributions including binary code include the above copyright notice and
9 * this paragraph in its entirety in the documentation or other materials
10 * provided with the distribution, and (3) all advertising materials mentioning
11 * features or use of this software display the following acknowledgement:
12 * ``This product includes software developed by the University of California,
13 * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
14 * the University nor the names of its contributors may be used to endorse
15 * or promote products derived from this software without specific prior
17 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
23 static const char rcsid[] =
24 "@(#) $Header: /tcpdump/master/tcpdump/print-lcp.c,v 1.9 2000/10/06 04:23:12 guy Exp $ (LBL)";
31 #include <sys/param.h>
33 #include <sys/socket.h>
35 #include <netinet/in.h>
40 #include "interface.h"
41 #include "addrtoname.h"
42 #include "extract.h" /* must come after interface.h */
60 static struct tok lcpcode2str[] = {
61 { LCP_CONFREQ, "ConfReq" },
62 { LCP_CONFACK, "ConfAck" },
63 { LCP_CONFNAK, "ConfNak" },
64 { LCP_CONFREJ, "ConfRej" },
65 { LCP_TERMREQ, "TermReq" },
66 { LCP_TERMACK, "TermAck" },
67 { LCP_CODEREJ, "CodeRej" },
68 { LCP_PROTREJ, "ProtRej" },
69 { LCP_ECHOREQ, "EchoReq" },
70 { LCP_ECHOREP, "EchoRep" },
71 { LCP_DISCARD, "Discard" },
88 static struct tok lcpoption2str[] = {
89 { LCP_RESERVED, "reserved"},
91 { LCP_ASYNCMAP, "asyncmap"},
92 { LCP_AUTHPROTO, "auth"},
93 { LCP_QUALPROTO, "qual"},
94 { LCP_MAGICNUM, "magic"},
95 { LCP_PCOMP, "pcomp"},
96 { LCP_ACFCOMP, "acfcomp"},
97 { LCP_CALLBACK, "callback"},
101 static struct tok lcpauth2str[] = {
107 static struct tok lcpqual2str[] = {
112 static struct tok lcpchap2str[] = {
119 lcp_print(register const u_char *bp, u_int length)
121 u_short lcp_code, lcp_id, lcp_length;
122 const u_char *lcp_data;
126 if (snapend < lcp_data) {
133 lcp_length = EXTRACT_16BITS(bp+2);
135 printf("LCP %s id=0x%x", tok2str(lcpcode2str, "LCP-#%d", lcp_code), lcp_id);
144 u_char lcpopt_type, lcpopt_length;
145 const u_char *p=lcp_data;
146 while (p+2 < lcp_data+lcp_length && p+2 < snapend) {
148 lcpopt_length = p[1];
150 printf(" <%s ",tok2str(lcpoption2str, "option-#%d", lcpopt_type));
152 switch (lcpopt_type) {
154 if (snapend < p+2) return;
155 printf("%d",ntohs(*(u_short*)p));
156 if (lcpopt_length != 4) printf(" len=%d!",lcpopt_length);
159 if (snapend < p+2) return;
160 printf("%s",tok2str(lcpauth2str, "AUTH-%#x", ntohs(*(u_short*)p)));
161 if (lcpopt_length < 4) printf(" len=%d!",lcpopt_length);
162 if (lcpopt_length >= 5 && p < snapend)
163 printf(" %s",tok2str(lcpchap2str, "%#x", p[0]));
166 if (snapend < p+2) return;
167 printf("%s",tok2str(lcpqual2str, "QUAL-%#x", ntohs(*(u_short*)p)));
168 if (lcpopt_length < 4) printf(" len=%d!",lcpopt_length);
169 /* Print data field of auth? */
173 if (snapend < p+4) return;
174 printf("%#x", (unsigned)ntohl(*(u_long*)p));
175 if (lcpopt_length != 6) printf(" len=%d!",lcpopt_length);
180 if (lcpopt_length != 2) printf(" len=%d!",lcpopt_length);
183 if (lcpopt_length != 2) printf(" len=%d",lcpopt_length);
194 if (snapend < lcp_data+4) return;
195 printf(" magic=%#x", (unsigned)ntohl(*(u_long *) lcp_data));
199 if (snapend < lcp_data+2) return;
200 printf(" prot=%s", tok2str(ppptype2str, "PROT-%#x", ntohs(*(u_short *) lcp_data)));
201 /* TODO print rejected packet too ? */
204 if (snapend < lcp_data+4) return;
206 lcp_print(lcp_data, (lcp_length+lcp_data > snapend ? snapend-lcp_data : lcp_length));