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-pppoe.c,v 1.15 2001/07/05 18:54:17 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"
43 #include "ethertype.h"
45 #include "extract.h" /* must come after interface.h */
56 static struct tok pppoecode2str[] = {
57 { PPPOE_PADI, "PADI" },
58 { PPPOE_PADO, "PADO" },
59 { PPPOE_PADR, "PADR" },
60 { PPPOE_PADS, "PADS" },
61 { PPPOE_PADT, "PADT" },
62 { 0, "" }, /* PPP Data */
69 PPPOE_SERVICE_NAME = 0x0101,
70 PPPOE_AC_NAME = 0x0102,
71 PPPOE_HOST_UNIQ = 0x0103,
72 PPPOE_AC_COOKIE = 0x0104,
73 PPPOE_VENDOR = 0x0105,
74 PPPOE_RELAY_SID = 0x0110,
75 PPPOE_SERVICE_NAME_ERROR = 0x0201,
76 PPPOE_AC_SYSTEM_ERROR = 0x0202,
77 PPPOE_GENERIC_ERROR = 0x0203
80 static struct tok pppoetag2str[] = {
82 { PPPOE_SERVICE_NAME, "Service-Name" },
83 { PPPOE_AC_NAME, "AC-Name" },
84 { PPPOE_HOST_UNIQ, "Host-Uniq" },
85 { PPPOE_AC_COOKIE, "AC-Cookie" },
86 { PPPOE_VENDOR, "Vendor-Specific" },
87 { PPPOE_RELAY_SID, "Relay-Session-ID" },
88 { PPPOE_SERVICE_NAME_ERROR, "Service-Name-Error" },
89 { PPPOE_AC_SYSTEM_ERROR, "AC-System-Error" },
90 { PPPOE_GENERIC_ERROR, "Generic-Error" },
94 #define PPPOE_HDRLEN 6
97 pppoe_if_print(u_char *user, const struct pcap_pkthdr *h,
98 register const u_char *p)
100 register u_int length = h->len;
101 register u_int caplen = h->caplen;
107 * Some printers want to get back at the link level addresses,
108 * and/or check that they're not walking off the end of the packet.
109 * Rather than pass them all the way down, we set these globals.
112 snapend = p + caplen;
114 pppoe_print(p, length);
122 pppoe_print(register const u_char *bp, u_int length)
124 u_short pppoe_ver, pppoe_type, pppoe_code, pppoe_sessionid, pppoe_length;
125 const u_char *pppoe_packet, *pppoe_payload;
128 if (pppoe_packet > snapend) {
133 pppoe_ver = (pppoe_packet[0] & 0xF0) >> 4;
134 pppoe_type = (pppoe_packet[0] & 0x0F);
135 pppoe_code = pppoe_packet[1];
136 pppoe_sessionid = EXTRACT_16BITS(pppoe_packet + 2);
137 pppoe_length = EXTRACT_16BITS(pppoe_packet + 4);
138 pppoe_payload = pppoe_packet + PPPOE_HDRLEN;
140 if (snapend < pppoe_payload) {
141 printf(" truncated PPPoE");
145 if (pppoe_ver != 1) {
146 printf(" [ver %d]",pppoe_ver);
148 if (pppoe_type != 1) {
149 printf(" [type %d]",pppoe_type);
152 printf("PPPoE %s", tok2str(pppoecode2str, "PAD-%x", pppoe_code));
153 if (pppoe_code == PPPOE_PADI && pppoe_length > 1484 - PPPOE_HDRLEN) {
154 printf(" [len %d!]",pppoe_length);
156 if (pppoe_sessionid) {
157 printf(" [ses 0x%x]", pppoe_sessionid);
160 if (pppoe_payload + pppoe_length < snapend) {
162 const u_char *x = pppoe_payload + pppoe_length;
163 printf(" [length %d (%d extra bytes)]",
164 pppoe_length, snapend - pppoe_payload - pppoe_length);
165 default_print(x, snapend - x);
167 snapend = pppoe_payload+pppoe_length;
171 /* PPP session packets don't contain tags */
172 u_short tag_type = 0xffff, tag_len;
173 const u_char *p = pppoe_payload;
177 * p points to next tag,
178 * tag_type is previous tag or 0xffff for first iteration
180 while (tag_type && p + 4 < pppoe_payload + length &&
182 tag_type = EXTRACT_16BITS(p);
183 tag_len = EXTRACT_16BITS(p + 2);
185 /* p points to tag_value */
192 for (v = p; v < p + tag_len; v++)
193 if (*v >= 127 || *v < 32) {
198 /* TODO print UTF8 decoded text */
200 l = (tag_len < 80 ? tag_len : 80);
201 printf(" [%s \"%*.*s\"]",
202 tok2str(pppoetag2str, "TAG-0x%x", tag_type),
206 tok2str(pppoetag2str, "TAG-0x%x", tag_type));
208 printf(" [%s]", tok2str(pppoetag2str,
209 "TAG-0x%x", tag_type));
212 /* p points to next tag */
216 ppp_print(pppoe_payload, pppoe_length);