1 /*
2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997
3 * The Regents of the University of California. All rights reserved.
4 *
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
16 * written permission.
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.
20 */
21
22 /* \summary: Marvell (Ethertype) Distributed Switch Architecture printer */
23
24 #ifdef HAVE_CONFIG_H
25 #include <config.h>
26 #endif
27
28 #include "netdissect-stdinc.h"
29
30 #include "netdissect.h"
31 #include "ethertype.h"
32 #include "addrtoname.h"
33 #include "extract.h"
34
35 /*
36 * Format of (Ethertyped or not) DSA tagged frames:
37 *
38 * 7 6 5 4 3 2 1 0
39 * . . . . . . . . .
40 * 0 +---+---+---+---+---+---+---+---+
41 * | Ether Destination Address |
42 * +6 +---+---+---+---+---+---+---+---+
43 * | Ether Source Address |
44 * +6 +---+---+---+---+---+---+---+---+ +-
45 * | Prog. DSA Ether Type [15:8] | | (8-byte) EDSA Tag
46 * +1 +---+---+---+---+---+---+---+---+ | Contains a programmable Ether type,
47 * | Prog. DSA Ether Type [7:0] | | two reserved bytes (always 0),
48 * +1 +---+---+---+---+---+---+---+---+ | and a standard DSA tag.
49 * | Reserved (0x00 0x00) | |
50 * +2 +---+---+---+---+---+---+---+---+ | +-
51 * | Mode |b29| Src/Trg Dev | | | (4-byte) DSA Tag
52 * +1 +---+---+---+---+---+---+---+---+ | | Contains a DSA tag mode,
53 * |Src/Trg Port/Trunk |b18|b17|b16| | | source or target switch device,
54 * +1 +---+---+---+---+---+---+---+---+ | | source or target port or trunk,
55 * | PRI [2:0] |b12| VID [11:8] | | | and misc (IEEE and FPri) bits.
56 * +1 +---+---+---+---+---+---+---+---+ | |
57 * | VID [7:0] | | |
58 * +1 +---+---+---+---+---+---+---+---+ +- +-
59 * | Ether Length/Type |
60 * +2 +---+---+---+---+---+---+---+---+
61 * . . . . . . . . .
62 *
63 * Mode: Forward, To_CPU, From_CPU, To_Sniffer
64 * b29: (Source or Target) IEEE Tag Mode
65 * b18: Forward's Src_Is_Trunk, To_CPU's Code[2], To_Sniffer's Rx_Sniff
66 * b17: To_CPU's Code[1]
67 * b16: Original frame's CFI
68 * b12: To_CPU's Code[0]
69 */
70
71 #define TOK(tag, byte, mask, shift) ((GET_U_1(&(((const u_char *) tag)[byte])) & (mask)) >> (shift))
72
73 #define DSA_LEN 4
74 #define DSA_MODE(tag) TOK(tag, 0, 0xc0, 6)
75 #define DSA_MODE_TO_CPU 0x0
76 #define DSA_MODE_FROM_CPU 0x1
77 #define DSA_MODE_TO_SNIFFER 0x2
78 #define DSA_MODE_FORWARD 0x3
79 #define DSA_TAGGED(tag) TOK(tag, 0, 0x20, 5)
80 #define DSA_DEV(tag) TOK(tag, 0, 0x1f, 0)
81 #define DSA_PORT(tag) TOK(tag, 1, 0xf8, 3)
82 #define DSA_TRUNK(tag) TOK(tag, 1, 0x04, 2)
83 #define DSA_RX_SNIFF(tag) TOK(tag, 1, 0x04, 2)
84 #define DSA_CFI(tag) TOK(tag, 1, 0x01, 0)
85 #define DSA_PRI(tag) TOK(tag, 2, 0xe0, 5)
86 #define DSA_VID(tag) ((u_short)((TOK(tag, 2, 0xe0, 5) << 8) | (TOK(tag, 3, 0xff, 0))))
87 #define DSA_CODE(tag) ((TOK(tag, 1, 0x06, 1) << 1) | TOK(tag, 2, 0x10, 4))
88
89 #define EDSA_LEN 8
90
91 static const struct tok dsa_mode_values[] = {
92 { DSA_MODE_TO_CPU, "To CPU" },
93 { DSA_MODE_FROM_CPU, "From CPU" },
94 { DSA_MODE_TO_SNIFFER, "To Sniffer"},
95 { DSA_MODE_FORWARD, "Forward" },
96 { 0, NULL }
97 };
98
99 static const struct tok dsa_code_values[] = {
100 { 0x0, "BPDU (MGMT) Trap" },
101 { 0x1, "Frame2Reg" },
102 { 0x2, "IGMP/MLD Trap" },
103 { 0x3, "Policy Trap" },
104 { 0x4, "ARP Mirror" },
105 { 0x5, "Policy Mirror" },
106 { 0, NULL }
107 };
108
109 static void
tag_common_print(netdissect_options * ndo,const u_char * p)110 tag_common_print(netdissect_options *ndo, const u_char *p)
111 {
112 if (ndo->ndo_eflag) {
113 ND_PRINT("mode %s, ", tok2str(dsa_mode_values, "unknown", DSA_MODE(p)));
114
115 switch (DSA_MODE(p)) {
116 case DSA_MODE_FORWARD:
117 ND_PRINT("dev %u, %s %u, ", DSA_DEV(p),
118 DSA_TRUNK(p) ? "trunk" : "port", DSA_PORT(p));
119 break;
120 case DSA_MODE_FROM_CPU:
121 ND_PRINT("target dev %u, port %u, ",
122 DSA_DEV(p), DSA_PORT(p));
123 break;
124 case DSA_MODE_TO_CPU:
125 ND_PRINT("source dev %u, port %u, ",
126 DSA_DEV(p), DSA_PORT(p));
127 ND_PRINT("code %s, ",
128 tok2str(dsa_code_values, "reserved", DSA_CODE(p)));
129 break;
130 case DSA_MODE_TO_SNIFFER:
131 ND_PRINT("source dev %u, port %u, ",
132 DSA_DEV(p), DSA_PORT(p));
133 ND_PRINT("%s sniff, ",
134 DSA_RX_SNIFF(p) ? "ingress" : "egress");
135 break;
136 default:
137 break;
138 }
139
140 ND_PRINT("%s, ", DSA_TAGGED(p) ? "tagged" : "untagged");
141 ND_PRINT("%s", DSA_CFI(p) ? "CFI, " : "");
142 ND_PRINT("VID %u, ", DSA_VID(p));
143 ND_PRINT("FPri %u, ", DSA_PRI(p));
144 } else {
145 switch (DSA_MODE(p)) {
146 case DSA_MODE_FORWARD:
147 ND_PRINT("Forward %s %u.%u, ",
148 DSA_TRUNK(p) ? "trunk" : "port",
149 DSA_DEV(p), DSA_PORT(p));
150 break;
151 case DSA_MODE_FROM_CPU:
152 ND_PRINT("CPU > port %u.%u, ",
153 DSA_DEV(p), DSA_PORT(p));
154 break;
155 case DSA_MODE_TO_CPU:
156 ND_PRINT("port %u.%u > CPU, ",
157 DSA_DEV(p), DSA_PORT(p));
158 break;
159 case DSA_MODE_TO_SNIFFER:
160 ND_PRINT("port %u.%u > %s Sniffer, ",
161 DSA_DEV(p), DSA_PORT(p),
162 DSA_RX_SNIFF(p) ? "Rx" : "Tx");
163 break;
164 default:
165 break;
166 }
167
168 ND_PRINT("VLAN %u%c, ", DSA_VID(p), DSA_TAGGED(p) ? 't' : 'u');
169 }
170 }
171
172 static void
dsa_tag_print(netdissect_options * ndo,const u_char * bp)173 dsa_tag_print(netdissect_options *ndo, const u_char *bp)
174 {
175 if (ndo->ndo_eflag)
176 ND_PRINT("Marvell DSA ");
177 else
178 ND_PRINT("DSA ");
179 tag_common_print(ndo, bp);
180 }
181
182 static void
edsa_tag_print(netdissect_options * ndo,const u_char * bp)183 edsa_tag_print(netdissect_options *ndo, const u_char *bp)
184 {
185 const u_char *p = bp;
186 uint16_t edsa_etype;
187
188 edsa_etype = GET_BE_U_2(p);
189 if (ndo->ndo_eflag) {
190 ND_PRINT("Marvell EDSA ethertype 0x%04x (%s), ", edsa_etype,
191 tok2str(ethertype_values, "Unknown", edsa_etype));
192 ND_PRINT("rsvd %u %u, ", GET_U_1(p + 2), GET_U_1(p + 3));
193 } else
194 ND_PRINT("EDSA 0x%04x, ", edsa_etype);
195 p += 4;
196 tag_common_print(ndo, p);
197 }
198
199 void
dsa_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)200 dsa_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
201 {
202 u_int caplen = h->caplen;
203 u_int length = h->len;
204
205 ndo->ndo_protocol = "dsa";
206 ndo->ndo_ll_hdr_len +=
207 ether_switch_tag_print(ndo, p, length, caplen, dsa_tag_print, DSA_LEN);
208 }
209
210 void
edsa_if_print(netdissect_options * ndo,const struct pcap_pkthdr * h,const u_char * p)211 edsa_if_print(netdissect_options *ndo, const struct pcap_pkthdr *h, const u_char *p)
212 {
213 u_int caplen = h->caplen;
214 u_int length = h->len;
215
216 ndo->ndo_protocol = "edsa";
217 ndo->ndo_ll_hdr_len +=
218 ether_switch_tag_print(ndo, p, length, caplen, edsa_tag_print, EDSA_LEN);
219 }
220