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)
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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
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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 1.12 2000/10/09 02:59:40 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_print(register const u_char *bp, u_int length)
99 register const struct ether_header *eh;
100 register u_short pppoe_ver, pppoe_type, pppoe_code, pppoe_sessionid, pppoe_length;
101 const u_char *pppoe_packet, *pppoe_payload;
103 eh = (struct ether_header *)packetp;
104 pppoe_packet = packetp+ETHER_HDRLEN;
105 if (pppoe_packet > snapend) {
110 pppoe_ver = (pppoe_packet[0]&0xF0)>>4;
111 pppoe_type = (pppoe_packet[0]&0x0F);
112 pppoe_code = (pppoe_packet[1]);
113 pppoe_sessionid = (EXTRACT_16BITS(pppoe_packet+2));
114 pppoe_length = (EXTRACT_16BITS(pppoe_packet+4));
115 pppoe_payload = pppoe_packet+6;
117 if (snapend < pppoe_payload) {
118 printf(" truncated PPPoE");
122 if (pppoe_ver != 1) {
123 printf(" [ver %d]",pppoe_ver);
125 if (pppoe_type != 1) {
126 printf(" [type %d]",pppoe_type);
129 printf("PPPoE %s", tok2str(pppoecode2str, "PAD-%x", pppoe_code));
130 if (pppoe_code == PPPOE_PADI && pppoe_length > 1484-PPPOE_HDRLEN) {
131 printf(" [len %d!]",pppoe_length);
133 if (pppoe_sessionid) {
134 printf(" [ses 0x%x]",pppoe_sessionid);
137 if (pppoe_payload + pppoe_length < snapend) {
139 printf(" [length %d (%d extra bytes)]", pppoe_length, snapend-pppoe_payload-pppoe_length);
141 const u_char *x = pppoe_payload+pppoe_length;
142 default_print(x, snapend - x);
145 snapend = pppoe_payload+pppoe_length;
150 /* PPP session packets don't contain tags */
151 u_short tag_type = 0xffff, tag_len;
152 const u_char *p = pppoe_payload;
155 p points to next tag,
156 tag_type is previous tag or 0xffff for first iteration
159 p+4 < pppoe_payload + length &&
161 tag_type = EXTRACT_16BITS(p);
162 tag_len = EXTRACT_16BITS(p+2);
164 /* p points to tag_value */
170 for (v=p; v<p+tag_len; v++)
171 if (*v >= 127 || *v < 32) {
176 /* TODO print UTF8 decoded text */
178 printf(" [%s \"%*.*s\"]",
179 tok2str(pppoetag2str, "TAG-0x%x", tag_type),
180 tag_len < 80 ? tag_len : 80,
181 tag_len < 80 ? tag_len : 80,
185 printf(" [%s UTF8]", tok2str(pppoetag2str, "TAG-0x%x", tag_type));
187 printf(" [%s]", tok2str(pppoetag2str, "TAG-0x%x", tag_type));
190 /* p points to next tag */
194 /* We now make use of ppp_print() instead, because it has more
195 comprehensive support for PPP. It also gives us a consistent
196 output with other protocols like L2TP. */
198 if (pppoe_payload[0] & 0x1) {
199 ptype = pppoe_payload[0];
202 } else if (pppoe_payload[1] & 0x1) {
203 ptype = ntohs(*(u_short *)pppoe_payload);
207 printf(" Invalid PPP protocol ID: %x %x", pppoe_payload[0],pppoe_payload[1]);
212 ip_print(pppoe_payload, pppoe_length);
213 else if (ptype == PPP_LCP)
214 lcp_print(pppoe_payload, pppoe_length);
216 printf("%s ", tok2str(ppptype2str, "proto-0x%x", ptype));
219 ppp_print(pppoe_payload, pppoe_length);